Documentation for routine cosh assembled from the following pages:

Class: Cool §

From Cool

(Cool) routine cosh §

Defined as:

sub cosh(Numeric(Cool))
method cosh()

Coerces the invocant (or in sub form, its argument) to Numeric, and returns its Cosine hyperbolicus.

say cosh(0.5);              # OUTPUT: «1.12762596520638␤»