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JEE Mains · Maths · STD 11 - 10.2 parabola,ellipse,hyperbola

माना \(\mathrm{C}\) सबसे बड़ा वृत्त है, जिसका केन्द्र \((2,0)\) पर है तथा जो दीर्घवृत \(\frac{\mathrm{x}^2}{36}+\frac{\mathrm{y}^2}{16}=1\) के अंतर्गत है। यदि बिन्दु \((1, \alpha)\) वृत्त \(C\) पर है, तो \(10 \alpha^2\) बराबर है_______________. 

  1. A \(117\)
  2. B \(116\)
  3. C \(118\)
  4. D \(125\)
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Answer & Solution

Correct Answer

(C) \(118\)

Step-by-step Solution

Detailed explanation

Equation of normal of ellipse \(\frac{x^2}{36}+\frac{y^2}{16}=1\) at any point \(P (6 \cos \theta, 4 \sin \theta)\) is \(3 \sec \theta x-2 \operatorname{cosec} \theta y=10\) this normal is also the normal of the circle passing through the point \((2,0)\) So, \(6 \sec \theta=10\)…
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