Value of tan⁻¹{2sin(2cos⁻¹(√3/2))}

Question

Evaluate:

\[ \tan^{-1}\left\{2\sin\left(2\cos^{-1}\left(\frac{\sqrt{3}}{2}\right)\right)\right\} \]

Solution

First, evaluate:

\[ \cos^{-1}\left(\frac{\sqrt{3}}{2}\right) = \frac{\pi}{6} \]

So,

\[ 2\cos^{-1}\left(\frac{\sqrt{3}}{2}\right) = \frac{\pi}{3} \]

Now,

\[ \sin\left(\frac{\pi}{3}\right) = \frac{\sqrt{3}}{2} \]

Thus,

\[ 2 \cdot \frac{\sqrt{3}}{2} = \sqrt{3} \]

Now evaluate:

\[ \tan^{-1}(\sqrt{3}) = \frac{\pi}{3} \]

Final Answer:

\[ \boxed{\frac{\pi}{3}} \]

Key Concept

Break the expression step-by-step using standard values and identities.

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