Algosim documentation: cosh

cosh

The hyperbolic cosine function.

Syntax

Description

Image 1

The hyperbolic cosine function is defined by

cosh(z) = [e^z + e^−z]/2

for all complex z.

Examples

cosh(0)
1
cosh(1)
1.54308063482
cosh(i)
0.540302305868

Notes

The graph of the hyperbolic cosine function is known as the “catenary”:

Image 2

See also