1. The problem statement, all variables and given/known data I would just like some help on how to find the integral of: sin(x) / cos(x)^2 2. Relevant equations integration by parts? uv-integral of v(du) 3. The attempt at a solution I tried using integration of parts with u = cos(x)^2 and dv = sin(x) but I just got myself in a bigger mess. I noticed that sin(x) / cos(x)^2 was equal to tan(x)sec(x). Not sure if that helps though... Help please?!