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If tangents and are drawn from a point on the circle  to the ellipse  so that the fourth vertex of parallelogram  lies on the circumcircle of triangle , then eccentricity of the ellipse is

a)

b)

c)

d)



Question ID - 56134 | SaraNextGen Top Answer

If tangents and are drawn from a point on the circle  to the ellipse  so that the fourth vertex of parallelogram  lies on the circumcircle of triangle , then eccentricity of the ellipse is

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

A cyclic parallelogram will be a rectangle or square

So,

 lies on director circle of the ellipse

 is director circle of

127 votes


127