Primitive of Reciprocal of Hyperbolic Tangent of a x

Theorem

 * $\ds \int \frac {\d x} {\tanh a x} = \frac {\ln \size {\sinh a x} } a + C$

Also see

 * Primitive of $\dfrac 1 {\sinh a x}$


 * Primitive of $\dfrac 1 {\cosh a x}$


 * Primitive of $\dfrac 1 {\coth a x}$


 * Primitive of $\dfrac 1 {\sech a x}$


 * Primitive of $\dfrac 1 {\csch a x}$