coshf.3.gz

COSH

cosh, coshf, coshl - hyperbolic cosine function

#include <math.h>
 I double cosh(double  x );

I float coshf(float  x );

I long double coshl(long double  x );

Link with -lm.

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

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