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

यदि वृत्त \(x^2+y^2-2 x+y=5\) के बिंदुओं \(P\) तथा \(Q\) पर स्पर्श रेखाएँ बिंदु \(\mathrm{R}\left(\frac{9}{4}, 2\right)\) पर मिलती हैं, तो त्रिभुज \(\mathrm{PQR}\) का क्षेत्रफल है

  1. A \(\frac{13}{4}\)
  2. B \(\frac{13}{8}\)
  3. C \(\frac{5}{4}\)
  4. D \(\frac{5}{8}\)
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Answer & Solution

Correct Answer

(D) \(\frac{5}{8}\)

Step-by-step Solution

Detailed explanation

Equation of circle is \(x^2+y^2-2 x+y-5=0\) \(R=\frac{5}{2}\) Length of \(P R=Q R=\sqrt{S_1}\) \(=\sqrt{\frac{81}{16}+4-\frac{2 \times 9}{4}+2-5}=\frac{5}{4}\) Area of triangle…
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