1. The problem statement, all variables and given/known data solve 3cos(x) + 3 = 2 sin^2(x) where 0 <= x < 2pi 2. Relevant equations 3. The attempt at a solution 3(cos(x) + 1) = 2 sin^2(x) 3(cos(x) + 1) = 2 (1- cos^2(x)) I've tried this variation, and a couple others but it just does not pan out. Please help. Oh yeah we have a real uninformative book.