ArcTan
Belongs to : FunctionDescription
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.
Example code
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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; { ArcTan of PI/2 = 1.00388479232788 } |