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JEE Mains · Maths · STD 11 - Trigonometrical equations

समीकरण \(32^{\tan ^{2} x}+32^{\sec ^{2} x}=81,0 \leq x \leq \frac{\pi}{4}\) के हलों की संख्या है

  1. A \(3\)
  2. B \(1\)
  3. C \(0\)
  4. D \(2\)
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Answer & Solution

Correct Answer

(B) \(1\)

Step-by-step Solution

Detailed explanation

\((32)^{\tan ^{2} x}+(32)^{\sec ^{2} x}=81\) \(\Rightarrow(32)^{\tan ^{2} x}+(32)^{1+\tan ^{2} x}=81\) \(\Rightarrow(32)^{\tan ^{2} x}=\frac{81}{33}\) In interval \(\left[0, \frac{\pi}{4}\right]\) only one solution
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