ArTanH

Return inverse hyperbolic tangent

Declaration

Source position: math.pp line 378

  function ArTanH(x: Float) : Float;

Description

artanh returns the inverse hyperbolic tangent of its argument x, where x should lie in the interval [-1,1], borders included. The arctanh variant of this function is supplied for Delphi compatibility.

Errors

In case x is not in the interval [-1,1], an EInvalidArgument exception is raised.

See also

Name	Description
arccos	Return inverse cosine
arcosh	Return inverse hyperbolic cosine
arcsin	Return inverse sine
artanh	Return inverse hyperbolic tangent

Example

Program Example5;
{ Program to demonstrate the artanh function. }
Uses math;
begin
  Writeln(artanh(0));
  Writeln(artanh(0.5));
end.