COSH

Section: Linux Programmer's Manual (3)
Updated: 2002-07-27
Index Return to Main Contents
 

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.  

DESCRIPTION

The cosh() function returns the hyperbolic cosine of x, which is defined mathematically as (exp(x) + exp(-x)) / 2.  

CONFORMING TO

SVr4, POSIX, 4.3BSD, C99. The float and the long double variants are C99 requirements.  

SEE ALSO

acosh(3), asinh(3), atanh(3), ccos(3), sinh(3), tanh(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
CONFORMING TO
SEE ALSO

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