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Reference for unit 'System' (#rtl)

ArcTan

Calculate inverse tangent

Declaration

Source position: mathh.inc line 109

function ArcTan(

d: ValReal

):ValReal;

Description

Arctan returns the Arctangent of X, which can be any Real type. The resulting angle is in radial units.

Errors

None

Example

Program Example4;

{ Program to demonstrate the ArcTan function. }

Var R : Real;

begin
  R:=ArcTan(0);      { R:=0 }
  R:=ArcTan(1)/pi;   { R:=0.25 }
end.

Sin		Calculate sine of angle
Cos		Calculate cosine of angle

ArcTan

Declaration

Description

Errors

See also

Example