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JEE Mains · Maths · STD 12 - 3 and 4 . metrices and determinant

यदि \(f(\theta)=\left|\begin{array}{ccc}-\sin ^{2} \theta & -1-\sin ^{2} \theta & 1 \\ -\cos ^{2} \theta & -1-\cos ^{2} \theta & 1 \\ 12 & 10 & -2\end{array}\right|\) द्वारा परिभाषित फलन \(f :\left[\frac{\pi}{4}, \frac{\pi}{2}\right] \rightarrow R\) के निम्नतम तथा उच्चतम मान क्रमशः \(m\) तथा \(M\) हैं, तो क्रमित युग्म \(( m , M )\) बराबर है

  1. A \((0,4)\)
  2. B \((-4,4)\)
  3. C \((0,2 \sqrt{2})\)
  4. D \((-4,0)\)
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Answer & Solution

Correct Answer

(D) \((-4,0)\)

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Detailed explanation

\(C _{3} \rightarrow C _{3}-\left( C _{1}- C _{2}\right)\) \(f(\theta)=\left|\begin{array}{ccc}-\sin ^{2} \theta & -1-\sin ^{2} \theta & 0 \\ -\cos ^{2} \theta & -1-\cos ^{2} \theta & 0 \\ 12 & 10 & -4\end{array}\right|\)…
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