Solution
Expression : cot -11π/6
$$\because cot(-x) = -cot (x)$$
= $$-cot(\frac{11\pi}{6})$$
= $$-cot(2\pi - \frac{\pi}{6})$$
= $$-[-cot(\frac{\pi}{6})] = cot(\frac{\pi}{6})$$
= $$\sqrt{3}$$
=> Ans - (D)
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