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

Theorem

 * $\ds \int \frac {\csc^2 a x \rd x} {\cot a x} = \frac {-\ln \size {\cot a x} } a + C$

Also see

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