Triple Angle Formulas/Hyperbolic Sine

Theorem

 * $\sinh 3 x = 3 \sinh x + 4 \sinh^3 x$

where $\sinh$ denotes hyperbolic sine.

Also see

 * Triple Angle Formula for Hyperbolic Cosine
 * Triple Angle Formula for Hyperbolic Tangent


 * Quadruple Angle Formula for Hyperbolic Sine
 * Quadruple Angle Formula for Hyperbolic Cosine
 * Quadruple Angle Formula for Hyperbolic Tangent