Keep trying until you find the correct answer.

1. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

2. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

3. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

4. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

5. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

6. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

7. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

8. Consider the reference circle diagram shown below of an harmonic wave travelling to the right (v > 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

9. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
   

   1.   ?    0
   2.   ?    ¹/₄π (45°)
   3.   ?    ¹/₂π (90°)
   4.   ?    ³/₄π (135°)
   5.   ?    π (180°)
   6.   ?    ⁵/₄π (225°)
   7.   ?    ³/₂π (270°)
   8.   ?    ⁷/₄π (315°)

10. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

11. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

12. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

13. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

14. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

15. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

16. Consider the reference circle diagram shown below of an harmonic wave travelling to the left (v < 0) at t = 0 and x = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

17. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

18. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

19. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

20. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

21. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

22. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

23. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

24. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

25. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

26. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

27. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

28. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

29. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

30. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

31. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

32. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

33. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

34. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

35. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

36. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

37. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

38. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

39. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

40. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

41. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

42. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

43. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

44. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

45. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

46. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

47. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

48. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

49. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

50. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

51. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

52. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

53. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

54. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

55. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

56. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

57. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

58. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

59. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

60. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

61. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

62. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

63. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

64. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the phase at the position of the dashed black vertical line?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

65. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

66. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

67. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

68. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

69. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

70. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

71. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

72. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

73. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

74. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

75. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

76. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

77. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

78. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

79. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

80. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
    

    1.   ?    
    2.   ?    
    3.   ?    
    4.   ?    
    5.   ?    
    6.   ?    
    7.   ?    
    8.   ?    

81. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

82. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

83. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

84. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

85. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

86. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

87. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

88. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

89. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

90. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

91. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

92. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

93. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

94. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

95. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

96. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₄T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

97. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

98. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

99. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
    

    1.   ?    0
    2.   ?    ¹/₄π (45°)
    3.   ?    ¹/₂π (90°)
    4.   ?    ³/₄π (135°)
    5.   ?    π (180°)
    6.   ?    ⁵/₄π (225°)
    7.   ?    ³/₂π (270°)
    8.   ?    ⁷/₄π (315°)

100. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

101. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

102. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

103. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

104. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

105. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

106. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

107. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

108. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

109. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

110. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

111. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

112. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ¹/₂T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

113. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

114. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

115. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

116. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

117. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

118. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

119. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

120. Consider the snapshot graph of an harmonic wave travelling to the right (v > 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

121. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

122. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

123. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

124. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

125. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

126. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

127. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

128. Consider the snapshot graph of an harmonic wave travelling to the left (v < 0) at t = ³/₄T where T is the period of the wave. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

129. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

130. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

131. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

132. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

133. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

134. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

135. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

136. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

137. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

138. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

139. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

140. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

141. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

142. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

143. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

144. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase constant φ₀?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

145. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

146. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

147. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

148. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

149. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

150. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

151. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

152. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

153. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

154. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

155. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

156. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

157. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

158. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

159. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

160. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the corresponding reference circle diagram?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

161. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

162. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

163. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

164. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

165. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

166. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

167. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

168. Consider the history graph of an harmonic wave travelling to the right (v > 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

169. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

170. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

171. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

172. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

173. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

174. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

175. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

176. Consider the history graph of an harmonic wave travelling to the left (v < 0) at x = 0. What is the phase at the positive of the dashed black vertical line?
     

     1.   ?    0
     2.   ?    ¹/₄π (45°)
     3.   ?    ¹/₂π (90°)
     4.   ?    ³/₄π (135°)
     5.   ?    π (180°)
     6.   ?    ⁵/₄π (225°)
     7.   ?    ³/₂π (270°)
     8.   ?    ⁷/₄π (315°)

177. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

178. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

179. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

180. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

181. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

182. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

183. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

184. Consider the history graph below of an harmonic wave travelling to the right (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

185. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

186. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

187. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

188. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

189. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

190. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

191. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?    

192. Consider the history graph below of an harmonic wave travelling to the left (v > 0) at x = 0. What is the corresponding reference circle diagram of the dashed black vertical line?
     

     1.   ?    
     2.   ?    
     3.   ?    
     4.   ?    
     5.   ?    
     6.   ?    
     7.   ?    
     8.   ?