JEE Advanced 2022 Mathematics question
Consider the ellipse
+ = 1.
Let , , be a point. A straight line drawn through parallel to the -axis crosses the ellipse and its auxiliary circle at points and respectively, in the first quadrant. The tangent to the ellipse at the point intersects the positive -axis at a point . Suppose the straight line joining and the origin makes an angle with the positive -axis. List-I (I) If , then the area of the triangle is (II) If , then the area of the triangle is (III) If , then the area of the triangle is (IV) If , then the area of the triangle is List-II (P) (Q) 1 (R) (S) (T) The correct option is:
Solution
The auxiliary circle is , so and . The tangent at is , meeting the -axis at (the same point as for the circle's tangent at F). Area of $ FGH =
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