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Command: atanhf | Section: 3 | Source: NetBSD | File: atanhf.3
ATANH(3) FreeBSD Library Functions Manual ATANH(3)
NAME
atanh, atanhf, atanhl - inverse hyperbolic tangent function
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
hyperbolic tangent of the real argument x.
RETURN VALUES
If |x|>=1, atanh(x), atanhf(x), and atanhl(x) return +inf, -inf or NaN,
and sets the global variable errno to EDOM.
SEE ALSO
acosh(3), asinh(3), exp(3), math(3)
STANDARDS
The atanh() function conforms to ISO/IEC 9899:1999 ("ISO C99").
HISTORY
The atanh() function appeared in 4.3BSD.
FreeBSD 14.1-RELEASE-p8 January 29, 2013 FreeBSD 14.1-RELEASE-p8