Primitive of Square of Cosecant of a x over Cotangent of a x

Theorem

 * $\displaystyle \int \frac {\csc^2 a x \ \mathrm d x} {\cot a x} = \frac {-\ln \left\vert{\cot a x}\right\vert} a + C$

Also see

 * Primitive of $\dfrac {\sec^2 a x } {\tan a x}$