please I need help I don't know how to solve this!!!!!!

## this is a half angle problem... let sinx=-1/3 with x in Quadrant III evaluate sinx/2

Tutors, please sign in to answer this question.

# 1 Answer

x/2 is in quadrant 2. Therefore,

cos(x) = -sqrt(8)/3,

sin(x/2) = sqrt[(1/2)(1-cosx)] = sqrt[(1/2)(1+sqrt(8)/3)]