Primitive of Cotangent of a x

Theorem

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

Also see

 * Primitive of $\sin a x$
 * Primitive of $\cos a x$
 * Primitive of $\tan a x$
 * Primitive of $\sec a x$
 * Primitive of $\csc a x$