C-09-Q199mediumsingle_mcqIf cosθ=12\cos\theta = \dfrac{1}{2}cosθ=21, then cotθ=?\cot\theta = ?cotθ=?a13\dfrac{1}{\sqrt{3}}31b111c3\sqrt{3}3d222ব্যাখ্যাcosθ=12\cos\theta=\tfrac12cosθ=21 corresponds to θ=60∘\theta=60^\circθ=60∘, where cot60∘=13\cot 60^\circ=\tfrac{1}{\sqrt3}cot60∘=31.