ATANH(3) BSD Library Functions Manual ATANH(3)NAMEatanh — inverse hyperbolic tangent function
SYNOPSIS
#include <math.h>
double
atanh(double x);
DESCRIPTION
The atanh() function computes the inverse hyperbolic tangent of the real
argument x.
SPECIAL VALUES
atanh(�0) returns �0.
atanh(�1) returns �infinity and raises the "divide-by-zero" floating-
point exception.
atanh(x) returns a NaN and raises the "invalid" floating-point exception
for |x| > 1.
SEE ALSOacosh(3), asinh(3), exp(3), infnan(3), math(3), matherr(3)STANDARDS
The atanh() function conforms to ISO/IEC 9899:1999(E).
4.3 Berkeley Distribution November 20, 2002 4.3 Berkeley Distribution