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

જો ઉગમ બિંદુ પરથી ઉપવલય \(\frac{x^2}{4}+\frac{y^2}{b^2}=1, b < 2\) નાં અભિલંબનું મહત્તમ અંતર \(1\) હોય,તો ઉપવલયની ઉત્કેન્દ્રતા \(.........\) છે.

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

Answer & Solution

Correct Answer

(B) \(\frac{\sqrt{3}}{2}\)

Step-by-step Solution

Detailed explanation

Equation of normal is \(2 x \sec \theta-b y \operatorname{cosec} \theta=4-b^2\) Distance from \((0,0)=\frac{4-b^2}{\sqrt{4 \sec ^2 \theta+b^2 \operatorname{cosec}^2 \theta}}\) Distance is maximum if \(4 \sec ^2 \theta+b^2 \operatorname{cosec}^2 \theta\) is minimum…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app