In Exercises 63–72, use a right triangle to write each expression as an algebraic expression. Assume that x is positive and that the given inverse trigonometric function is defined for the expression in x. 63. tan(cos- x) 64. sin(tan-! x) 65. cos(sin-1 2x) 66. sin(cos-1 2x) 67. cos( sin) 68. sec cos 69. cot tan V3. 70. cot tan Vz 9 71. sec sin 72. cot sin x² +4.

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