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

माना वक्र \(9 x^2+16 y^2=144\) की एक स्पर्श रेखा निर्देशांक अक्षों को बिन्दुओं \(\mathrm{A}\) तथा \(\mathrm{B}\) पर मिलती है। तो रेखाखंड \(\mathrm{AB}\) की न्यूनतम लंबाई_______________. 

  1. A \(5\)
  2. B \(6\)
  3. C \(7\)
  4. D \(8\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(7\)

Step-by-step Solution

Detailed explanation

Equation of tangent at point \(P (4 \cos \theta, 3 \sin \theta)\) is \(\frac{x \cos \theta}{4}+\frac{y \sin \theta}{3}=1\) So A is \((4 \sec \theta, 0)\) and point \(B\) is \((0,3 \operatorname{cosec} \theta)\) Length…
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