Hello everyone, This one makes me very confuse! Can someone please tell me how to solve the following integration? 1. The problem statement, all variables and given/known data Solve the following integration: 2. Relevant equations integral (x cos^2(x) / (1 + x)^1/2) dx 3. The attempt at a solution Confuse If above equation isn't clear enough, please see below image: [PLAIN]http://img148.imageshack.us/img148/6692/70786744.png [Broken] Thank you very much for your help.