Consider this example problem that has been solved:

7. Give the exact value of each expression without using a calculator. {a} care (2 tan1 (3)) cos (2 tan1(3)): cos 28 = tic-326' 511129 = (3)2 (3)2 = i E 3 9 (c) sin sin 1= + tan-1(3) 2 A B = sin(A + B) = sinAcosB + cosAsinB to ) + ( 3 3 = 1+3v3 V10 10+3v30 V10 2V10 V10 20 V10 3 A 3 B7. Give the exact value of each expression without using a calculator. (a) cos (2 cos-1 WIN (b) sin cos-1 + tan-1 (2) )