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

माना रेखा \( y-x=1 \) दीर्घवृत्त \( \frac{x^{2}}{2}+\frac{y^{2}}{1}=1 \) को बिंदुओं A और B पर प्रतिच्छेद करती है। तब रेखाखंड AB द्वारा दीर्घवृत्त के केंद्र पर बनाया गया कोण ___ है।

  1. A \( \pi-\tan^{-1}(\frac{1}{4}) \)
  2. B \( \frac{\pi}{2}+\tan^{-1}(\frac{1}{4}) \)
  3. C \( \frac{\pi}{2}+2\tan^{-1}(\frac{1}{4}) \)
  4. D \( \frac{\pi}{2}-\tan^{-1}(\frac{1}{4}) \)
Verified Solution

Answer & Solution

Correct Answer

(B) \( \frac{\pi}{2}+\tan^{-1}(\frac{1}{4}) \)

Step-by-step Solution

Detailed explanation

By solving line & equation of ellipse we get x = 0 \(\&\ x=-\frac{4}{3}\) \(\therefore B \left(-\frac{4}{3},-\frac{1}{3}\right)\) \(m _{ OB }=\tan \theta=\frac{1}{4}\) \(\because \angle AOB =\frac{\pi}{2}+\theta=\frac{\pi}{2}+\tan ^{-1} \frac{1}{4}\)
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