hyperbolic cosecant

hyperbolic cosecant (plural hyperbolic cosecants)

1. (mathematics) A hyperbolic function that is written in symbol csch and defined as the following:

   ${\displaystyle \operatorname {csch} (x)={\frac {1}{\sinh(x)}}={\frac {2}{e^{x}-e^{-x}}}}$.

• hyperbolic sine