Delphiで恐縮だが。

const
 Max = 60;
 Radius = 20;
var
 i, x, y: Integer;
begin
 x := Round(Radius * Cos(PI * 2 * i / Max));
 y := Round(Radius * Sin(PI * 2 * i / Max));
 Inc(i);

 Draw(x, y);
end;