# cosh(3) [mojave man page]

```COSH(3) 						   BSD Library Functions Manual 						   COSH(3)

NAME
cosh -- hyperbolic cosine function

SYNOPSIS
#include <math.h>

double
cosh(double x);

long double
coshl(long double x);

float
coshf(float x);

DESCRIPTION
The coshf() function computes the hyperbolic cosine of x.

SPECIAL VALUES
cosh(+-0) returns 1.

cosh(+-infinity) returns +infinity.

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

STANDARDS
The cosh() function conforms to ISO/IEC 9899:2011.

BSD								 December 11, 2006							       BSD```

## Check Out this Related Man Page

```COSH(3) 						     Linux Programmer's Manual							   COSH(3)

NAME
cosh, coshf, coshl - hyperbolic cosine function

SYNOPSIS
#include <math.h>

double cosh(double x);
float coshf(float x);
long double coshl(long double x);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

coshf(), coshl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99

DESCRIPTION
The cosh() function returns the hyperbolic cosine of x, which is defined mathematically as:

cosh(x) = (exp(x) + exp(-x)) / 2

RETURN VALUE
On success, these functions return the hyperbolic cosine of x.

If x is a NaN, a NaN is returned.

If x is +0 or -0, 1 is returned.

If x is positive infinity or negative infinity, positive infinity is returned.

If the result overflows, a range error occurs, and the functions return +HUGE_VAL, +HUGE_VALF, or +HUGE_VALL, respectively.

ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.

The following errors can occur:

Range error: result overflow
errno is set to ERANGE.  An overflow floating-point exception (FE_OVERFLOW) is raised.

CONFORMING TO
C99, POSIX.1-2001.  The variant returning double also conforms to SVr4, 4.3BSD.

BUGS
In glibc version 2.3.4 and earlier, an overflow floating-point (FE_OVERFLOW) exception is not raised when an overflow occurs.