Difference of Squares of Hyperbolic Cotangent and Cosecant

Theorem

 * $\coth^2 x - \operatorname{csch}^2 x = 1$

where $\coth$ and $\operatorname{csch}$ are hyperbolic cotangent and hyperbolic cosecant.

Also defined as
This result can also be reported as:
 * $\coth^2 x - 1 = \operatorname{csch}^2 x$