Primitive of Hyperbolic Cosecant of a x

Theorem

 * $\displaystyle \int \operatorname{csch} a x \ \mathrm d x = \frac 1 a \ln \left\vert {\tanh \frac {a x} 2} \right\vert + C$

Also see

 * Primitive of $\sinh a x$
 * Primitive of $\cosh a x$
 * Primitive of $\tanh a x$
 * Primitive of $\coth a x$
 * Primitive of $\operatorname{sech} a x$