atanh(), atanhf()

inverse hyperbolic tangent function 

Function


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.


PARAMETERS

x 

Is a value between -1.0 and 1.0, exclusive.


RETURN VALUES

The atanh() function returns the inverse hyperbolic tangent.

If x is greater than 1.0 or x is NaN, then:

If the absolute value of x is 1.0, a value of infinity is returned. If in POSIX mode, errno is set to EDOM.

If x is NaN, atanh() returns NaN.


CONFORMANCE

atanh(): UNIX 98

atanhf(): PTC MKS Toolkit UNIX APIs extension


MULTITHREAD SAFETY LEVEL

MT-Safe.


PORTING ISSUES

None.


AVAILABILITY

PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition


SEE ALSO

Functions:
acosh(), asinh(), exp(), math(), matherr()


PTC MKS Toolkit 10.3 Documentation Build 39.