http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_w11_qp_33.pdf1. The problem statement, all variables and given/known data no. 10i cant do ii and iii without doing i first 2. Relevant equations tan(x) d/dx(tan(x))=sec^2x 1+tan^2x=sec^2x 3. The attempt at a solution Okay, my terms at first would be u^n+2 +u^n. Then, du/dx = sec^2x, so i get du/1+u^2 = dx. In the end i got (u^n+2 +u^n)/1+u^2. From then on im stuck. Or did i do something wrong at first?