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Solve question number 2,,,it's a question of ellipse chapter from book of Vikas Gupta mathematics for IIT jee

Solve question number 2,,,it's a question of ellipse chapter from book of Vikas Gupta mathematics for IIT jee

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Grade:12th pass

1 Answers

Dilli PRASAD
24 Points
3 years ago
Eqt of tangent to ellipse xcosthita/2+ysintita/3-1=
Length of chord =2root r2-d2
Where r =5 d= distance from centre to tangent =6/root of(5cos2tita+4) 
Length of chord =2root[25-(36/5cos2tita+4)] for minimum length cos2tita should be max. Max value of cos2tita is 1
So we get 2.4=8

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