| Description |
The ArcTan function is a mathematical function giving the value in radians of the Arc Tangent of Number.
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| 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.
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| Related commands |
| ArcCos |
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The Arc Cosine of a number, returned in radians |
| ArcSin |
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The Arc Sine of a number, returned in radians |
| Cos |
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The Cosine of a number |
| Sin |
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The Sine of a number |
| Tan |
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The Tangent of a number |
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| 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.
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| Hide full unit code |
ArcTan of PI/2 = 1.00388479232788
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