Primitive of Power of Hyperbolic Tangent of a x by Square of Hyperbolic Secant of a x

Theorem

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

Also see

 * Primitive of $\coth^n a x \csch^2 a x$