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

एक अतिपरवलय \(4 x^{2}-y^{2}=36\) के बिंदुओ \(P\) तथा \(Q\) पर स्यर्श रेखाएँ खींची जाती है। यदि यह स्पर्शरखाएँ बिंदु \(T(0,3)\) पर काटती हैं, तो \(\Delta P T Q\) का क्षेत्रफल (वर्ग इकाइयों में) है

  1. A \(54\sqrt 3 \)
  2. B \(60\sqrt 3 \)
  3. C \(36\sqrt 5 \)
  4. D \(45\)\(\sqrt 5 \)
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Answer & Solution

Correct Answer

(D) \(45\)\(\sqrt 5 \)

Step-by-step Solution

Detailed explanation

(4) Here equation of hyperbola is \(\frac{{{x^2}}}{9} - \frac{{{y^2}}}{{36}} = 1\) Now, \(PQ\) is the chord of contant \(\therefore \) Equation of \(PQ\) is \(\,:\frac{{x\left( 0 \right)}}{9} - \frac{{y\left( 3 \right)}}{{36}} = 1\) \( \Rightarrow y = - 12\) \(\therefore \) Area…
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