MirOS Manual: atanh(3), atanhf(3)

ATANH(3)                   BSD Programmer's Manual                    ATANH(3)

NAME

     atanh, atanhf - inverse hyperbolic tangent function

LIBRARY

     libm

SYNOPSIS

     #include <math.h>

     double
     atanh(double x);

     float
     atanhf(float x);

DESCRIPTION

     The atanh() and atanhf() functions compute the inverse hyperbolic tangent
     of the real argument x.

RETURN VALUES

     If |x|>=1, atanh(x) and atanhf(x) return +inf, -inf or NaN, and sets the
     global variable errno to EDOM.

SEE ALSO

     acosh(3), asinh(3), exp(3), math(3)

HISTORY

     The atanh() function appeared in 4.3BSD.

MirOS BSD #10-current            May 6, 1991                                 1

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