Please help me take this integral!?

Question

Evaluate the indefinite integral. (Enter all trigonometrical functions in terms of sin.)

integral sign of cot (29x)dx

(sorry I don't know how to put in the integral sign.)

Answer 1

cot (29x) dx = cos(29x) / sin (29x) dx

let sin(29x) = u

29 cos(29x) dx = du

cos(29x) dx =(1/29) du

The given integral becomes

Integral (1/29) du / u

=(1/29) ln |u| +C

= (1/29) ln |sin(29x)| + C