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## Main Question or Discussion Point

It's been a while since I've been in a math class. I'm just trying to make a simple openGL demo, and I ran into this problem.

If you look at the picture, I know the values of:

x, y

x', y'

θ

Now, from those, how can I find X2' and Y2' on a cartesian coordinate system?

lol, the question might seem dumb, but I've been out of touch for a long time and while I've done some searches I did not find anything specific.

Any help would be greatly appreciated!

Thanks!