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cosh, coshf
[hyperbolic cosine]

SYNOPSIS

#include <math.h> 
double cosh(double x); 
float coshf(float x) 

DESCRIPTION

cosh computes the hyperbolic cosine of the argument x.

cosh(x) is defined as the following equation.

Angles are specified in radians. coshf is identical, save that it takes and returns float.

RETURNS

The computed value is returned. When the correct value would create an overflow, cosh returns the value HUGE_VAL with the appropriate sign, and the global value errno is set to ERANGE.

You can modify error handling for these functions using the function matherr.

COMPLIANCE

cosh is ANSI. coshf is an extension.