\[\tan \left( {{90}^{o}}-{{\cot }^{-1}}\frac{1}{3} \right)=\]

1.	\[\tan \left( {{90}^{o}}-{{\cot }^{-1}}\frac{1}{3} \right)=\]
A.	3
B.	\[\frac{2}{3}\]
C.	\[\frac{1}{3}\]
D.	\[\frac{1}{\sqrt{10}}\]
Answer» D. \[\frac{1}{\sqrt{10}}\]

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\[\tan \left( {{90}^{o}}-{{\cot }^{-1}}\frac{1}{3} \right)=\]

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