The figure shows a fixed circle with equation and a shrinking circle with radius and center the origin. is the point , is the upper point of the intersection of the two circles, and is the point of intersection of the line and the x-axis. What happens to the x-coordinate of as shrinks, that is, as ?

The x-coordinate of
If the answer is infinity or negative infinity, enter or as appropriate. If the limit does not exist, type DNE.