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    Cos

    Calculate cosine of angle.

    Declaration

    Source position: mathh.inc line 126

    function Cos(d: ValReal) : ValReal;

    Description

    Cos returns the cosine of X, where X is an angle, in radians. If the absolute value of the argument is larger than 2^63, then the result is undefined.

    Errors

    None.

    See also

    Name Description
    Arctan Calculate inverse tangent.
    Sin Calculate sine of angle.

    Example

    Program Example12;

{ Program to demonstrate the Cos function. }

Var R : Real;

begin
  R:=Cos(Pi);    { R:=-1 }
  R:=Cos(Pi/2);  { R:=0  }
  R:=Cos(0);     { R:=1  }
end.