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JEE Mains · Maths · STD 11 - 10.1 circle and system of circle

જો વક્ર \(x^{2}+2 y^{2}=2,\) રેખા \(x + y =1\) ને બે બિંદુઓ \(P\) અને \(Q\) એ છેદે, તો રેખાખંડ \(PQ\) એ ઊગમબિંદુ આગળ આંતરેલ ખૂણો ........ થાય.

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

Answer & Solution

Correct Answer

(D) \(\frac{\pi}{2}+\tan ^{-1}\left(\frac{1}{4}\right)\)

Step-by-step Solution

Detailed explanation

Homogenising \(x^{2}+2 y^{2}-2(x+y)^{2}=0\) \(\Rightarrow-x^{2}-4 x y=0 \Rightarrow x^{2}+4 x y=0\) Lines are \(x=0\) and \(y=-\frac{x}{4}\) Angle between lines \(=\frac{\pi}{2}+\tan ^{-1} \frac{1}{4}\)
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