# cosh(3) [osx 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
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

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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); Link with -lm. 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. SEE ALSO
acosh(3), asinh(3), atanh(3), ccos(3), sinh(3), tanh(3) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2008-08-10 COSH(3)
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