1. The problem statement, all variables and given/known data ∫cos(x)^2*tan(x)^3dx 2. Relevant equations 3. The attempt at a solution Were learning Integration by parts and u substitution but this one I can't figure out. I tried making it ∫cos(x)*(sin(x)^3)/(cos(x)^3)dx and then ∫tan(x)*sin(x)^2 but I don't know if I'm going in the right direction because I don't know how to solve from here.