NAME

cosh, coshf, coshl, — hyperbolic cosine function

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
cosh(double x);

float
coshf(float x);

long double
coshl(long double x);

DESCRIPTION

The cosh(), coshf() and coshl() functions compute the hyperbolic cosine of x.

RETURN VALUES

If the magnitude of x is too large, cosh(x) and coshf(x) return Inf and sets the global variable errno to ERANGE.

SEE ALSO

acos(3), asin(3), atan(3), atan2(3), cos(3), math(3), sin(3), sinh(3), tan(3), tanh(3)

STANDARDS

The cosh() function conforms to ANSI X3.159-1989 (“ANSI C89”).