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#### Arctan

Declaration:
  Function Arctan (X : Real) : Real;
Description:
  Arctan returns the Arctangent of X, which can be any Real type. The resulting angle is in radial units.
Errors:
  None
See also:
  Sin (574), Cos (478)

Listing: refex/ex4.pp

Program Example4;
{ Program to demonstrate the ArcTan function. }
Var R : Real;
begin
R:=ArcTan(0); { R:=0 }
R:=ArcTan(1)/pi; { R:=0.25 }
end.

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