Question: UT (20 pts) Use an identity to evaluate each expression below in exact value: a. (10 pts) sin 22.5 cos 22.50 cos2 22.50 - sin2

UT (20 pts) Use an identity to evaluate each expression below in exact value: a. (10 pts) sin 22.5 cos 22.50 cos2 22.50 - sin2 22.50 b. (10 pts) Hint: 1050 = 45 + 60. sin 76 cos 310 - cos 76 sin 310 sin 1050

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