TS EAMCET · Maths · Trigonometric Ratios & Identities
\(\operatorname{cosec}^{-1}\left[\left(\frac{\tan ^2\left(\frac{\alpha-\pi}{4}\right)-1}{\tan ^2\left(\frac{\alpha-\pi}{4}\right)+1}+\cos \frac{\alpha}{2} \cdot \cot 5 \alpha\right)_{\sec \frac{11 \alpha}{2}}\right]\)
- A \(2 \alpha\)
- B \(5 \alpha\)
- C \(\frac{\pi}{2}-4 \alpha\)
- D \(\frac{5}{2} \alpha\)
Answer & Solution
Correct Answer
(B) \(5 \alpha\)
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