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Returns the arctangent of a given value.
This function returns the arctangent of
X rounded to the current
global accuracy.
- @param X Value of which to compute the arctangent.
- @return The arctangent of X rounded to the current global accuracy.
Fn.SetAccuracy(20);
R := Fn.ArcTan(1/2);
Dec(R, 30);
0.46364760900080611621
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