COSH(3)

NAME
1.13 `cosh', `coshf'--hyperbolic cosine

SYNOPSIS
     #include <math.h>
     double cosh(double X);
     float coshf(float X)

DESCRIPTION
`cosh' computes the hyperbolic cosine of the argument X. `cosh(X)' is defined as
      (exp(x) + exp(-x))/2
   Angles are specified in radians. `coshf' is identical, save that it takes and returns `float'.

RETURNS
The computed value is returned. When the correct value would create an overflow, `cosh' returns the value `HUGE_VAL' with the appropriate sign, and the global value `errno' is set to `ERANGE'.
   You can modify error handling for these functions using the function `matherr'.

PORTABILITY
`cosh' is ANSI. `coshf' is an extension.

SEE ALSO
cosh is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.