Primitive of Power of Cotangent of a x by Square of Cosecant of a x

Theorem

 * $\ds \int \cot^n a x \csc^2 a x \rd x = \frac {-\cot^{n + 1} a x} {\paren {n + 1} a} + C$

Also see

 * Primitive of $\tan^n a x \sec^2 a x$