Circular Movement Problem

programming flash
1

Hi guys! I’m having some problems understanding the logic behind this code:


var angle = 0;
var radius = 100;
onEnterFrame = function() {
 mc._x = Math.cos(angle) * radius;
 mc._y = Math.sin(angle) * radius;
 angle += .1;
}

As you can see this code makes “mc clip” to rotate with a radius of 100. I understand how sine waves works, but i can’t figured out how mixing Math.cos() and Math.sin() makes a circular movement (whats the foundation behind that?)

Time ago I found a tutorial about this subject here in Kirupa, unfortunately I’ve lost the URL.

Please, any explanation will be very useful. Thank you.