Recent content by abney317

I'm looking at this problem here. (Exam practice, move to homework if you want...) First part is easy, but it's the second part that I can't quite figure out. I'm trying to get from ∫xe2x cos(2x)dx to this answer: ¼e2x(x cos(2x) + x sin(2x) - ½sin(2x))+C