DelphiBasics
ArcTan
Function
The Arc Tangent of a number, returned in radians System unit
 function ArcTan ( const Number : Extended ) : Extended;
Description
The ArcTan function is a mathematical function giving the value in radians of the Arc Tangent of Number.
 
PI radians  = 180 degrees
Notes
The System unit supports only the following angular functions:

ArcTan
Sin
Cos


Special floating point values INF, -INF yield +PI/2 and -PI/2 respectively.
Related commands
ArcCos The Arc Cosine of a number, returned in radians
ArcSin The Arc Sine of a number, returned in radians
Cos The Cosine of a number
Sin The Sine of a number
Tan The Tangent of a number
 Author links

 Buy Website Traffic at
 Buywebsitetrafficexperts.com

 Buy Proxies at
 Buyproxies.io
 
 Download this web site as a Windows program.




 
Example code : Get the ArcTan of PI/2
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
 
unit Unit1;
 
interface
 
uses
  // The System unit does not need to be defined
  SysUtils,
  Forms, Dialogs;
 
type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  end;
 
var
  
Form1: TForm1;
 
implementation
{$R *.dfm} // Include form definitions
 
procedure TForm1.FormCreate(Sender: TObject);

var
  float : single;
begin
  // The ArcTan of PI/2 should give 1.0
  float := ArcTan(PI/2);
  ShowMessage('ArcTan of PI/2 = '+FloatToStr(float));
end;
 
end.
Hide full unit code
   ArcTan of PI/2 = 1.00388479232788
 
Delphi Programming Neil Moffatt 2002 - 2017. All rights reserved.  |  Home Page