In Exercises 21-28, an object moves in simple harmonic motion described by the given equation, where t is measured in seconds and d in inches. In each exercise, find the following: a. the maximum displacement b. the frequency c. the time required for one cycle. 5 cos 21. d = 5 cos 22. d = 10 cos 2nt 23. d = -6 cos 2nt 24. d = -8 cos t 25. d = sin 21 26. d = sin 21 27. d = -5 sin 28. d = -4 sin - 2

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