1. The problem statement, all variables and given/known data This problem is solved in my book however I dont totally understand it. find the integral of sin^2 (x) 2. Relevant equations 3. The attempt at a solution[/ the integral of sin^2 (x) = integral of (1-cos2x)/2 dx = (1/2)x -(1/4)sin2x + C I dont understand the las step basically how did the integra of (1-cos2x)/2 was changed into 2 integrals? Was it done this way (1-cos2x)/2 = 1/2 (-cos2x) ? Thanks a lot in advance.