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ATANH(3)		 BSD Library Functions Manual		      ATANH(3)

NAME
     atanh, atanhf, atanhl -- inverse hyperbolic tangent functions

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     atanh(double x);

     float
     atanhf(float x);

     long double
     atanhl(long double	x);

DESCRIPTION
     The atanh(), atanhf(), and	atanhl() functions compute the inverse hyper-
     bolic tangent of the real argument	x.  For	a discussion of	error due to
     roundoff, see math(3).

RETURN VALUES
     These functions return the	inverse	hyperbolic tangent of x	if successful.
     If	the argument has absolute value	1, a divide-by-zero exception is
     raised and	an infinity is returned.  If |x| > 1, an invalid exception is
     raised and	an NaN is returned.

SEE ALSO
     acosh(3), asinh(3), exp(3), fenv(3), math(3)

HISTORY
     The atanh(), atanhf(), and	atanhl() functions appeared in 4.3BSD,
     FreeBSD 2.0, and FreeBSD 10.0, respectively.

BSD				 June 9, 2013				   BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | HISTORY

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