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Reference for unit 'System' (#rtl)

Cos

Calculate cosine of angle

Declaration

Source position: mathh.inc line 112

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.

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.

Arctan		Calculate inverse tangent
Sin		Calculate sine of angle

Cos

Declaration

Description

Errors

See also

Example