C-09-Q171mediumsingle_mcq1−cot260∘1+cot260∘=?\dfrac{1 - \cot^2 60^\circ}{1 + \cot^2 60^\circ} = ?1+cot260∘1−cot260∘=?a−12-\dfrac{1}{2}−21b12\dfrac{1}{2}2