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

एक वृत्त जिसका केन्द्र \((2,3)\) है तथा त्रिज्या \(4\) है, रेखा \(\mathrm{x}+\mathrm{y}=3\) को बिंदुओं \(\mathrm{P}\) तथा \(\mathrm{Q}\) पर काटता है। यदि \(P\) तथा \(Q\) पर स्पर्श रेखाएँ बिंदु \(S(\alpha, \beta)\) पर मिलती हैं तो \(4 \alpha-7 \beta\) बराबर है___________. 

  1. A \(11\)
  2. B \(10\)
  3. C \(80\)
  4. D \(90\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(11\)

Step-by-step Solution

Detailed explanation

The given line is polar or \(P (2, \beta)\) w.r.t. given circle \(x^2+y^2-4 x-6 y-3=0\) Chord or contact \(\alpha x+\beta y-2(x+\alpha)-3(y+\beta)-3=0\) \(\Rightarrow(\alpha-2) x+(\beta-3) y-(2 \alpha+3 \beta+3)=0\) \(\because\) But the equation of chord of contact is given as :…
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