Derivative of Hyperbolic Cotangent Function

Theorem

 * $\dfrac {\mathrm d}{\mathrm d x} \left({\coth x}\right) = \operatorname{csch}^2 x$

where $\coth x$ denotes the hyperbolic cotangent and $\operatorname{csch} x$ denotes the hyperbolic cosecant.

Also see

 * Derivative of Hyperbolic Tangent