Primitive of Cosecant of a x/Cosecant minus Cotangent Form

Theorem

 * $\ds \int \csc a x \rd x = \frac 1 a \ln \size {\csc a x - \cot a x} + C$

where $\csc a x - \cot a x \ne 0$.

Also see

 * Primitive of $\sec a x$: Secant plus Tangent Form