A+B=90° এবং tan A= \(\cfrac{3}{4}\) হলে, cot B-এর মান (a) \(\cfrac{3}{4}\) (b) \(\cfrac{4}{3}\) (c) \(\cfrac{3}{5}\) (d) \(\cfrac{4}{5}\)

Answer: A
tanA=\(\cfrac{3}{4}\)
বা, tan(90\(^o\)-B)=\(\cfrac{3}{4}\)
বা, cotB=\(\cfrac{3}{4}\)

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