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

एक बिंदु \((-2,-1)\) से एक वक्र \(y^{2}=4 x\) पर दो स्पर्श रेखाएँ खींची गई है, यदि उनके बीच का कोण \(\alpha\) है, तो \(|\tan \alpha|\) बराबर है

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

Correct Answer

(D) \(3\)

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Detailed explanation

The locus of the point of intersection of tangents to the parabola \({y^2} = 4ax\) inclined at an angle \(\alpha \) to each other is \({\tan ^2}\alpha {\left( {x + a} \right)^2} = {y^2} - 4ax\) Given equation of Parabola \({y^2} - 4a\left\{ {a = 1} \right\}\) Point of…
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