tan \(\left( \frac{1}{4} \sin^{-1} \sqrt{63}/8 \right)\)-এর একটি সম্ভাব্য মান হল:

  1. 1/(2√2)
  2. 1/√7
  3. √7 - 1
  4. 2√2 - 1

Answer (Detailed Solution Below)

Option 2 : 1/√7

Detailed Solution

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গণনা:

প্রদত্ত, \(\tan \left(\frac{1}{4} \sin ^{-1} \sqrt{63} / 8\right)\)

ধরা যাক \(\sin ^{-1}(\sqrt{ 63} / 8)=\theta\)

\(\sin \theta=\sqrt{63} / 8\)

cos θ = 1/8

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2 cos2(θ/2) - 1 = 1/8

⇒ cos2 θ/2 = 9/16

cos θ/2 = 3/4

⇒ (1 - tan2 θ/4 )/(1 + tan2 θ/4) = 3/4

tan θ/4 = 1/√7

tan\(\left( \frac{1}{4} \sin^{-1} \sqrt{63}/8 \right)\) = 1/√7

∴ tan\(\left( \frac{1}{4} \sin^{-1} \sqrt{63}/8 \right)\)-এর মান = 1/√7

সঠিক উত্তরটি হল বিকল্প 2

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