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

बिंदु \((1,3)\) से दीर्घवृत्त \(2 x^2+3 y^2=5\) पर डाली गई दो स्पर्श रेखाओं के बीच न्यून कोण है :

  1. A \(\tan ^{-1}\left(\frac{16}{7 \sqrt{5}}\right)\)
  2. B \(\tan ^{-1}\left(\frac{24}{7 \sqrt{5}}\right)\)
  3. C \(\tan ^{-1}\left(\frac{32}{7 \sqrt{5}}\right)\)
  4. D \(\tan ^{-1}\left(\frac{3+8 \sqrt{5}}{35}\right)\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\tan ^{-1}\left(\frac{24}{7 \sqrt{5}}\right)\)

Step-by-step Solution

Detailed explanation

Equation of tangent to the ellipse \(2 x ^{2}+3 y ^{2}=5\) is \(y = mx \pm \sqrt{\frac{5}{2} m ^{2}+\frac{5}{3}}\) It pass through \((1,3)\) \(3=m \pm \sqrt{\frac{5}{2} m^{2}+\frac{5}{3}}\) \(3\,m^{2}+12\,m-\frac{44}{3}=0\) Let \(\theta\) be the angle between the tangents…
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