eagle SG change it to sin x / cos xThen notice that sin x is a differential of cos xIntegrate f'(x) / f(x) styleAnswer, u get-ln | cos x | + c
wee_ws SG Hi, The same approach will allow us to integrate cot x easily :) Try this: Find the integral of (sin x - cos x)/(sin x + cos x) with respect to x. Thanks!Cheers, Wen Shih