Evaluate the integral of cos(2x) from 0 to pi/2

Home Evaluate the integral of $ cos(2x) $ from $ 0 $ to $ frac{pi}{2} $ Answer 1 Charlotte Davis To evaluate the integral of $ cos(2x) $ from $ 0 $ to $ frac{pi}{2} $:$ int_0^{frac{pi}{2}} cos(2x) , dx $Use the substitution $ u = 2x $, then $ du = 2dx $ or $ dx =...