COSH

Returns the hyperbolic cosine of its argument

Implemented by: bw32, Gambas

With variations:

Also written as:

The BASIC Cookbook points out that BASICs which don't implement the function can achieve the same results, for a given X argument, with the following formula:

(EXP(-X) + EXP(X)) / 2

• TRACTON, Ken. The BASIC Cookbook, 1st edition. Tab Books. USA, 1978.