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.
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.