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

વર્તુળ \(C_1:(x-4)^2+(y-5)^2=4\) ની, વર્તુળ \(C_1\) ના કેન્દ્ર સાથે \(\theta_i\) ખૂણો આંતરતી જીવાઓનના મધ્યબિંદુુોનો બિંદુપથ એ ત્રિજ્યા \(r_i\) વાળુ વર્તુળ છે. જો \(\theta_1=\frac{\pi}{3}, \theta_3=\frac{2 \pi}{3}\) અને  \(r_1^2=r_2^2+r_3^2\), હોય,તો \(\theta_2=.......\)

  1. A \(\frac{\pi}{4}\)
  2. B \(\frac{3 \pi}{4}\)
  3. C \(\frac{\pi}{6}\)
  4. D \(\frac{\pi}{2}\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\frac{\pi}{2}\)

Step-by-step Solution

Detailed explanation

In \(\triangle C P B\) \(\cos \frac{\theta}{2}=\frac{P C}{2} \Rightarrow P C=2 \cos \frac{\theta}{2}\) \(\Rightarrow(h-4)^2+(k-5)^2=4 \cos ^2 \frac{\theta}{2}\) \(\text { Now }(x-4)^2+(y-5)^2=\left(2 \cos \frac{\theta}{2}\right)^2\)…
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