1. The problem statement, all variables and given/known data [itex]\int cos^6(x)[/itex] 2. Relevant equations [itex]1 = sin^2(x) + cos^2(x)[/itex] 3. The attempt at a solution [itex]\int cos(x) * cos^5(x)[/itex] [itex]\int cos(x) * (cos^2(x))^3[/itex] [itex]\int cos(x) * (1-sin^2(x))^3[/itex] This is where I got lost, we just started this topic and I have a lot of homework to do, but I can't get past this question. Please help!