tanh - hyperbolic tangent function


SYNOPSIS

       #include <math.h>

       double tanh(double x);


DESCRIPTION

       The  tanh()  function returns the hyperbolic tangent of x,
       which is defined mathematically as sinh(x) / cosh(x).


CONFORMING TO

       SVID 3, POSIX, BSD 4.3, ISO 9899


SEE ALSO

       acosh(3), asinh(3), atanh(3), cosh(3), sinh(3)


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