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JEE Main 2021
Conic Sections
Ellipse
Medium

Question

The area (in sq. units) of the quadrilateral formed by the tangents at the end points of the latera recta to the ellipse x29+y25=1{{{x^2}} \over 9} + {{{y^2}} \over 5} = 1, is :

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Solution

Problem Analysis and Goal: The problem asks us to find the area of a quadrilateral. This quadrilateral is specifically formed by drawing tangents to a given ellipse at the four endpoints of its latera recta. To solve this, we need to:

  1. Identify the parameters of the given ellipse (a,b,ea, b, e).
  2. Determine the coordinates of the four endpoints of the latera recta.
  3. Find the equations of the tangents at these four points.
  4. Calculate the intersection points of these tangents to find the vertices of the quadrilateral.
  5. Finally, compute the area of the quadrilateral formed by these vertices.

Key Concepts and Formulas:

  1. Standard Equation of an Ellipse: An ellipse centered at the origin with its

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