61-66. Right-triangle relationships Draw a right triangle to simplify the given expressions. Assume x>0 61. cos (sin x) 63. sin (cos(x/2)) 64. sin (cos 0), for 0 0 2 62. cos (sin(x/3)) 65. sin (2 cos x) (Hint: Use sin 20 = 2 sin 0 cos 0.) 0 66. cos (2 sinx) (Hint: Use cos 20 = cos - sin 0.)