Primitive of Hyperbolic Cosecant of a x

Theorem

 * $\ds \int \csch a x \rd x = \frac 1 a \ln \size {\tanh \frac {a x} 2} + C$

Also see

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