1COSH(3)                    Linux Programmer's Manual                   COSH(3)
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NAME

6       cosh, coshf, coshl - hyperbolic cosine function
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SYNOPSIS

9       #include <math.h>
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11       double cosh(double x);
12       float coshf(float x);
13       long double coshl(long double x);
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15       Link with -lm.
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DESCRIPTION

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

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

26       acosh(3), asinh(3), atanh(3), ccos(3), sinh(3), tanh(3)
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30                                  2002-07-27                           COSH(3)