ATANH(3) OpenBSD Programmer's Manual ATANH(3)NAME
atanh, atanhf - inverse hyperbolic tangent functions
SYNOPSIS
#include <math.h>
double
atanh(double x);
float
atanhf(float x);
DESCRIPTION
The atanh() function computes the inverse hyperbolic tangent of the real
argument x. The atanhf() function is a single precision version of
atanh().
RETURN VALUES
If |x|>=1, atanh(x) and atanhf(x) return +inf, -inf or NaN, and set the
global variable errno to EDOM.
SEE ALSOacosh(3), asinh(3), exp(3), infnan(3), math(3)HISTORY
The atanh() function appeared in 4.3BSD.
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9