getRGB with rotation?

I'm stumped...I've got a color wheel that I'm adjusting with sliders, and I need to get the rgb at a specific pixel location.

I've got it working for the y slider, but can't figure out the math for the rotation slider...

Anyone out there that can shed any light on this??

Got it...In case anyone else needs to do something like this, I used the following equations to set the adjustX and adjustY.

angle = the _x of the rot slider
rad = the _x of the y slider

adjustX=cx+Math.sin(angle)*rad;
adjustY=cy+Math.sin(angle)*rad;

Works GREAT!!

Thanks!