Description |
The ArcCos function is a mathematical function giving the value in radians of the Arc Cosine 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.
| | Related commands | ArcSin | | The Arc Sine of a number, returned in radians | ArcTan | | The Arc Tangent of a number, returned in radians | Cos | | The Cosine of a number | Sin | | The Sine of a number | Tan | | The Tangent of a number |
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Download this web site as a Windows program.
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Example code : The ArcCos of 0.5 gives 60 degrees | var
float : single;
begin
 // The ArcCos of 0.5 should give 60 degrees
float := ArcCos(0.5);
float := RadToDeg(float);  // Convert result to degrees
ShowMessage('ArcCos of 0.5 = '+FloatToStr(float)+' degrees');
end;
| Show full unit code | ArcCos of 0.5 = 60 degrees |
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