Which of the following points lies on the locus of the foot of perpendicular drawn upon
any tangent to the ellipse x24+y22=1 from any of its foci?
1, 2
−2, 3
−1, 2
−1, 3
Question is the definition of Auxiliary circle
Hence the auxiliary circle of x24+y22=1 is x2+y2=4 satisfies (-1,3)