Primitive of Power of Hyperbolic Tangent of a x

Theorem

 * $\ds \int \tanh^n a x \rd x = \frac {-\tanh^{n - 1} a x} {a \paren {n - 1} } + \int \tanh^{n - 2} a x \rd x + C$

Also see

 * Primitive of $\sinh^n a x$
 * Primitive of $\cosh^n a x$
 * Primitive of $\coth^n a x$
 * Primitive of $\sech^n a x$
 * Primitive of $\csch^n a x$