Skip to content

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.

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.