TMtxVec.ArcCos Methods

Summary

The inverse cosine.

Declaration

Function ArcCos(X: TMtxVec): TMtxVec;

Description

Calculate the inverse cosine of all X object elements and store the results in the calling object. Size and Complex properties of calling object are adjusted automatically.

Declaration

Function ArcCos(Index, Len: integer): TMtxVec;

Description

Calculate the inverse cosine of calling object elements [Index]...[Index+Len-1] in-place. An exception is raised if array borders are overrun.

Declaration

Function ArcCos: TMtxVec;

Description

Calculate the inverse cosine of all calling object elements in-place. Values must be between -1 and 1. The return values will be in the range [0,p], in radians.

See Also
Cos

Example 1

      var a: TVec;
      begin
        CreateIt(a);
        a.SetIt(True,[1,-0.5,0.11,0.9]);
        a.ArcCos;
        FreeIt(a);
      end;

Declaration

Function ArcCos(X: TMtxVec; XIndex, Index, Len: integer): TMtxVec;

Description

Calculate the inverse cosine of X object elements [XIndex]...[XIndex+Len-1]. The results are stored in calling object elements [Index]...[Index+Len-1]. Size and Complex properties of the calling object must be set explicitly. An exception is raised if array borders are overrun.