Simpson's Formulas/Hyperbolic Sine by Hyperbolic Cosine

Theorem

 * $\sinh x \cosh y = \dfrac {\sinh \paren {x + y} + \sinh \paren {x - y} } 2$

where $\sinh$ denotes hyperbolic sine and $\cosh$ denotes hyperbolic cosine.

Also presented as
This result can also be seen presented as:


 * $2 \sinh x \cosh y = \sinh \paren {x + y} + \sinh \paren {x - y}$