Actionscript 3.0 :: Math.cos - Change Arithmetic Positive Progression To Negative Progression

Code: Select allimport caurina.transitions.*;
addEventListener(Event.ENTER_FRAME , kop)
function kop(e:Event):void {
dot.x = mouseX ;
dot.y = mouseY ;
[Code]... 

What i done there i draw a box and made it to movieclip and instance named it hook and created a invisible dot and called it dot. Then I calculated distance from box to the mouse then i took that number and put it in Math.cos command. And finally i made tweener to change box scale depending what my mouse distance from it.So if my mouse is close the box is big , if far - box is small. Ok, I want to know is there another way to do this ? Cuz , i cant think of other way to change arithmetic positive progression(like 3,6,9,12) to negative progression(like 12,9,6,3) than Math.cos command.