From Clomosy Docs
function ArcTan(const X: Extended): Extended;
Calculates the arctangent of a given number.
In Clomosy code, ArcTan returns the arctangent of X.
X is a real-type expression that gives an angle in radians.
Example
var
floatValue : single;
const
PI = 3.14;
{
// The ArcTan of PI/2 should give 1.0
floatValue = ArcTan(PI/2);
ShowMessage('ArcTan of PI/2 = '+FloatToStr(floatValue));
}
Output:
ArcTan of PI/2 = 1,00365507798033