3\sqrt{2}
2\sqrt{3}
\sqrt{3}
\sqrt{2}
Correct answer is C
\tan (x - y) = \frac{\tan x - \tan y}{1 + \tan x \tan y}
\implies \frac{\tan 80 - \tan 20}{1 + \tan 80 \tan 20} = \tan (80 - 20) = \tan 60°
\tan 60 = \frac{\sin 60}{\cos 60} = \frac{\sqrt{3}}{2} ÷ \frac{1}{2}
= \sqrt{3}
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