C-09-Q072mediumsingle_mcqsinθ=45\sin\theta=\dfrac{4}{5}sinθ=54 হলে cotθ=\cot\theta=cotθ= ?a34\dfrac{3}{4}43b43\dfrac{4}{3}34c35\dfrac{3}{5}53d53\dfrac{5}{3}35