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Manual Reference Pages  - ATANH (3)

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NAME

atanh, atanhf, atanhl - inverse hyperbolic tangent function

CONTENTS

Synopsis
Description
Errors

SYNOPSIS

#include <math.h> 



double atanh(double x); 




float atanhf(float x); 




long double atanhl(long double x); 

Link with -lm.

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, atanh() returns not-a-number (NaN) and errno is set.

ERRORS

EDOM	x is out of range.

CONFORMING TO

SVr4, POSIX.1-2001, 4.3BSD, C89. The float and long double variants are C99 requirements.

SEE ALSO

acosh(3), asinh(3), catanh(3), cosh(3), sinh(3), tanh(3)

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ATANH (3)

2002-07-27

Generated by OpenAsthra.com from man3/atanh.3 using man macros.