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
Example code : Get the ArcTan of PI/2
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;
Show full unit code
ArcTan of PI/2 = 1.00388479232788