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

दीर्घवृत्त \(\frac{x^{2}}{9}+\frac{y^{2}}{5}=1\) के नाभिलम्बों के सिरों पर खींची गई स्पर्श रेखाओं द्वारा निर्मित चतुर्भुज का क्षेत्रफल (वर्ग इकाइयों में) है

  1. A \(27\)
  2. B \(\frac{{27}}{4}\)
  3. C \(18\)
  4. D \(\frac{{27}}{2}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(27\)

Step-by-step Solution

Detailed explanation

\(a=3, b=\sqrt{5}\) \(e=\sqrt{1-\frac{5}{9}}=\frac{2}{3}\) foci \(=(\pm 2,0)\) tangent at \(P \Rightarrow \frac{2 x}{9}+\frac{5 y}{3.5}=1\) \(\frac{2 x}{9}+\frac{y}{3}=1\) \(2 x+3 y=9\) Area of quadrilateral \(=4 \times \text { (area of triangle } \mathrm{QCR})\)…
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