Double Angle Formulas/Hyperbolic Sine/Corollary

Corollary to Double Angle Formula for Hyperbolic Sine

 * $\sinh \left({2 \theta}\right) = \dfrac {2 \tanh \theta}{1 - \tanh^2 \theta}$

where $\sinh$ and $\tanh$ denote hyperbolic sine and hyperbolic tangent respectively.