cosh

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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)
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