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

किसी \(\theta \in\left(0, \frac{\pi}{2}\right)\) के लिए, यदि अतिपरवलय \(x^{2}-y^{2} \sec ^{2} \theta=\) 10 को उत्केन्द्रता, दीर्घवृत्त, \(x ^{2} \sec ^{2} \theta+ y ^{2}=5\) की उत्केन्द्रता का \(\sqrt{5}\) गुणा है, तो दीर्घवृत्त की नाभिलम्ब जीवा की लम्बाई बराबर है -

  1. A \(\sqrt{30}\)
  2. B \(\frac{4 \sqrt{5}}{3}\)
  3. C \(2 \sqrt{6}\)
  4. D \(\frac{2 \sqrt{5}}{3}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\frac{4 \sqrt{5}}{3}\)

Step-by-step Solution

Detailed explanation

Given \(\theta \in\left(0, \frac{\pi}{2}\right)\) equation of hyperbola \(\Rightarrow x^{2}-y^{2} \sec ^{2} \theta=10\) \(\Rightarrow \frac{x^{2}}{10}-\frac{y^{2}}{10 \cos ^{2} \theta}=1\) Hence eccentricity of hyperbola…
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