1. The problem statement, all variables and given/known data Integrate e^3x sin x. 2. Relevant equations uv - Integral(v du) 3. The attempt at a solution I am trying to help somebody else with this problem, as I took Calculus a few years ago, but the end is really kicking my butt. I know I'm VERY close, but once I get to the second integration, I just get that u = cos x and du = -sin x. If I assign 1/3 e^3x to be dv, I just seem to get never ending equations in the integral that I can't remove. I know I'm very close, could someone give me a pointer in the right direction?