ellipse

JEE Mains 2015 Sample Questions › Co-ordinate Geometry questions › ellipse

If CF is the perpendicular from the centre C of the ellipse (x²/49)+(y²/25)=1 on the tangent at any point P, and G is the point where the normal at P meets the minor axis, then what is the value 0f (CF*PG)² ??????

#Mathematics #Co-ordinate Geometry

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Lokesh Verma ·2009-03-26 22:02:44

Do two things

take a point acosÎ¸, bsinÎ¸

Then the equation of tangent at that point

Now length fo the foot of the perpendicular.. It wont be tough..

I hope this helps you solve!

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∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

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ellipse

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