Originally Posted by
dwsmith I presumbe you mean csch(x)
$\displaystyle \displaystyle\text{csch}(x)=\frac{1}{\sinh(x)}=\fr ac{1}{\frac{e^x-e^{-x}}{2}}=\frac{2}{e^x-e^{-x}}$
Plug in different values and you will see they differ by a few decimals places.