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Sorry man, but obviously people have better things to do than fixing your sloppy coding. Here is the code that generates over a million random points within elliptic arc sector in a quarter of second.

This guy actually deals with circles, so in case it's not obvious how to use it with ellipses, I made the example here.

Indeed, there is. Or you could just pick random points in outscribed box until one of them eventually lands inside your ellipse.