\[\cos \left[ {{\tan }^{-1}}\frac{1}{3}+{{\tan }^{-1}}\frac{1}{2} \right]=\] [MP PET 1991; MNR 1990]

\[\cos \left[ {{\tan }^{-1}}\frac{1}{3}+{{\tan }^{-1}}\frac{1}{2} \rig

1.	\[\cos \left[ {{\tan }^{-1}}\frac{1}{3}+{{\tan }^{-1}}\frac{1}{2} \right]=\] [MP PET 1991; MNR 1990]
A.	\[\frac{1}{\sqrt{2}}\]
B.	\[\frac{\sqrt{3}}{2}\]
C.	\[\frac{1}{2}\]
D.	\[\frac{\pi }{4}\]
Answer» B. \[\frac{\sqrt{3}}{2}\]

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\[\cos \left[ {{\tan }^{-1}}\frac{1}{3}+{{\tan }^{-1}}\frac{1}{2} \right]=\] [MP PET 1991; MNR 1990]

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