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ATANH(3)		   Linux Programmer's Manual		      ATANH(3)

NAME
       atanh - inverse hyperbolic tangent function

SYNOPSIS
       #include	<math.h>

       double atanh(double x);

DESCRIPTION
       The  atanh()  function  calculates the inverse hyperbolic tangent of x;
       that is the value whose hyperbolic tangent is x.	 If the	absolute value
       of  x is	greater	than 1.0, acosh() returns not-a-number (NaN) and errno
       is set.

ERRORS
       EDOM   x	is out of range.

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

SEE ALSO
       asinh(3), acosh(3), cosh(3), sinh(3), tanh(3)

				  1993-06-13			      ATANH(3)

NAME | SYNOPSIS | DESCRIPTION | ERRORS | CONFORMING TO | SEE ALSO

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