1. The problem statement, all variables and given/known data Find constants c1 and c2 such that F(x) = c1xsinx+c2cosx is an antiderivative of f(x) = 4xcos(x)+3sin(x) 2. Relevant equations d/dx cosx = -sinx d/dx sinx = cosx 3. The attempt at a solution Don't know how to setup or handle a problem such as this. Prolly much simplier than I'm making it out to be, but heres my attempt: (-4(x^2)sinx)/(2) + 3cosx -2(x^2)sinx + 3cosx Any advice would help. I know my method is wrong.