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FPDoc Onlineexperiment

Cos function

In unit System

Calculate cosine of angle.

Declaration

pascal
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

Example: ex12

pascal
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.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.