ARCTAN                    Return angle of Tangent                    pp 139

 Syntax:  ArcTan (Tangent) ;

 Type:    Integer, Real

 Form:    Function

 Purpose: Returns the angle of Tangent in radians.  Tangent can be either
          type Real or Integer.  The result is type Real.


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 Usage:
       VAR
          Tangent : Real            ;      { Tangent value of type Real }
          Angle   : Real            ;      { Variable of type Real      }

       BEGIN
          Angle := ArcTan (Tangent) ;      { Set Angle in radians       }
       END.