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

माना बिंदु \(P (0, h )\) से वृत्त \(x^{2}+y^{2}=16\) पर खींची गई स्पर्श रेखाएँ \(x\)-अक्ष को बिंदुओं \(A\) तथा \(B\) पर मिलती हैं। यदि \(\triangle APB\) का क्षेत्रफल न्यूनतम है, तो \(h\) बराबर है

  1. A \(4\sqrt 2\)
  2. B \(3\sqrt 3\)
  3. C \(3\sqrt 2\)
  4. D \(4\sqrt 3\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(4\sqrt 2\)

Step-by-step Solution

Detailed explanation

\(OP = \frac{4}{{\sin \,\theta }}\) \(OB = \frac{4}{{\cos \,\theta }}\) Area \( = OP \times OB = \frac{{16}}{{\sin \,\theta \,\cos \,\theta \,}} = \frac{{32}}{{\sin \,2\theta }}\) least value \(\sin \,2\theta = 1;\theta = {45^0}\) So,…
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