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AP EAMCET · Maths · Trigonometric Ratios & Identities

If \(\theta=\frac{\pi}{6}\) and \(x=\log \left[\cot \left(\frac{\pi}{4}+\theta\right)\right]\), then \(\sin h(x)=\)

  1. A \(\sqrt{3}\)
  2. B \(\frac{1}{\sqrt{3}}\)
  3. C \(-\sqrt{3}\)
  4. D \(-\frac{1}{\sqrt{3}}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(-\sqrt{3}\)

Step-by-step Solution

Detailed explanation

\begin{aligned} & \text { At } \theta=\frac{\pi}{6}, x=\log \left[\cot \left(\frac{\pi}{4}+\theta\right)\right] \\ & \Rightarrow \quad x=\log \left[\cot \left(\frac{\pi}{4}+\frac{\pi}{6}\right)\right] \\ & \Rightarrow \quad e^x=\frac{\cot \pi / 4 \cot \pi / 6-1}{\cot \pi /…