SOLUTION: find sin(tan^-1(2/3) and find given that sin a=-8/17, and a is in QIV, find sin(a/2) and cos(a/2), thanks I need help in this area a=angle.

Algebra ->  Trigonometry-basics -> SOLUTION: find sin(tan^-1(2/3) and find given that sin a=-8/17, and a is in QIV, find sin(a/2) and cos(a/2), thanks I need help in this area a=angle.      Log On