Principal Value of cot⁻¹{2cos(sin⁻¹(√3/2))}

Evaluate: cot-1{2cos(sin-1(√3/2))}

Solution:

Step 1: Evaluate sin⁻¹(√3/2)

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

Step 2: Substitute

\[ 2\cos\left(\frac{\pi}{3}\right) \]

\[ = 2 \times \frac{1}{2} = 1 \]

Step 3: Apply cot⁻¹

\[ \cot^{-1}(1) \]

We know:

\[ \cot\left(\frac{\pi}{4}\right) = 1 \]

Principal value range of cot⁻¹(x):

\[ (0, \pi) \]

So,

\[ \cot^{-1}(1) = \frac{\pi}{4} \]

Final Answer:

Value = \[ \frac{\pi}{4} \]

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