NAME
cosh, coshf,
coshl —
hyperbolic cosine functions
SYNOPSIS
#include
<math.h>
double
cosh(double
x);
float
coshf(float
x);
long double
coshl(long
double x);
DESCRIPTION
The
cosh()
function computes the hyperbolic cosine of x. The
coshf()
function is a single precision version of cosh().
The
coshl()
function is an extended precision version of
cosh().
RETURN VALUES
If the magnitude of x is too large,
cosh(x),
coshf(x) and
coshl(x) return infinity and
set the global variable errno to
ERANGE.
SEE ALSO
acos(3), asin(3), atan(3), atan2(3), cos(3), sin(3), sinh(3), tan(3), tanh(3)
HISTORY
The cosh() function first appeared in
Version 7 AT&T UNIX.