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actionscript 3 - Find the point with radius and angle

I'm not a genius in geometry, I'd like to find a point in as3 with the radius and a angle but I don't remember the rule, I know this should be simple!

Here's an example:

alt text http://img297.imageshack.us/img297/4879/examplepr.png

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as3.x = centerX + radius * cos(angle)
as3.y = centerY + radius * sin(angle)

Note that the rotation in the picture linked to is in the "negative direction". I.e, an increase of the angle, yields a counter-clockwise rotation.


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