Question: Only 61, 63, 65 61-66. Right-triangle relationships Draw a right triangle to simplify the given expressions. Assume x > 0. 61. cos (sin x) 62.

Only 61, 63, 65

61-66. Right-triangle relationships Draw a right triangle to simplify the given expressions. Assume x > 0. 61. cos (sin x) 62. cos (sin ' (x/3) ) 63. sin (cos (x/2) ) 64. sin (cos 0), for 0 = 0 65. sin (2 cos x) (Hint: Use sin 20 = 2 sin 0 cos 0.) 66. cos (2 sin x) (Hint: Use cos 20 = cos2 0 - sin2 0.) 67-74. Identities Prove the following identities

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