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hi ,I need help with questions 21, 23, 29, 31, 32, 33, 35, 37, 39, 49, 51 and 53. I would appreciate if all the

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hi ,I need help with questions 21, 23, 29, 31, 32, 33, 35, 37, 39, 49, 51 and 53. I would appreciate if all the steps are shown thank you.

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In Exercises 21-24, use the addition formulas for sine and cosine to simplify each expression. 21. sin(7 + s) - sin(7 - s) 23. cos(3 - 0) - cos(3 + 0) 29. Suppose that sin 0 = 1/5 and 0

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