COSH(3)

NAME
       cosh - hyperbolic cosine function

SYNOPSIS
       #include <<math.h>>

       double cosh(double x);

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

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       acosh(3) asinh(3) atanh(3) sinh(3) tanh(3)