ATANH 3CW "09 March 2006" "mathcw-1.00"

Table of contents


NAME

atanhf, atanh, atanhl, atanhw, atanhq, atanhll, atanhdf, atanhd, atanhdl, atanhdll - inverse hyperbolic tangent function

SYNOPSIS

cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ]

#include <mathcw.h>

extern float atanhf (float x);

extern double atanh (double x);

extern long double atanhl (long double x);

extern __float80 atanhw (__float80 x);

extern __float128 atanhq (__float128 x);

extern long_long_double atanhll (long_long_double x);

extern decimal_float atanhdf (decimal_float x);

extern decimal_double atanhd (decimal_double x);

extern decimal_long_double atanhdl (decimal_long_double x);

extern decimal_long_long_double atanhdll (decimal_long_long_double x);

NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.


DESCRIPTION

Compute the inverse hyperbolic tangent. The value of x should be in the range [-1,+1].

RETURN VALUES

For in-range arguments, the returned value is in the range [-Infinity, +Infinity]. Otherwise, the returned value is a quiet NaN.

ERRORS

For out-of-range, Infinity, and NaN arguments, the returned value is a quiet NaN, and errno is set to EDOM.

SEE ALSO

acosh(3CW), asinh(3CW), cosh(3CW), sinh(3CW), sinhcosh(3CW), tanh(3CW).