ArcCos

Return inverse cosine

Declaration

Source position: math.pp line 357

function ArcCos(

x: Float

):Float;

Description

Arccos returns the inverse cosine of its argument x. The argument x should lie between -1 and 1 (borders included).

Errors

If the argument x is not in the allowed range, an EInvalidArgument exception is raised.

Example

Program Example1;

{ Program to demonstrate the arccos function. }

Uses math;

  Procedure WriteRadDeg(X : float);

  begin
    Writeln(X:8:5,' rad = ',radtodeg(x):8:5,' degrees.')
  end;

begin
  WriteRadDeg (arccos(1));
  WriteRadDeg (arccos(sqrt(3)/2));
  WriteRadDeg (arccos(sqrt(2)/2));
  WriteRadDeg (arccos(1/2));
  WriteRadDeg (arccos(0));
  WriteRadDeg (arccos(-1));
end.

arcsin		Return inverse sine
arcosh		Return inverse hyperbolic cosine
arsinh		Return inverse hyperbolic sine
artanh		Return inverse hyperbolic tangent

ArcCos

Declaration

Description

Errors

See also

Example