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.