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?

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1, 2

−2, 3

−1, 2

−1, 3

answer is D.

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Detailed Solution

Question is the definition of Auxiliary circle Hence the auxiliary circle of x24+y22=1 is x2+y2=4 satisfies (-1,3)

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