\[2{{\tan }^{-1}}\left( \frac{1}{3} \right)+{{\tan }^{-1}}\left( \frac{1}{7} \right)=\] [EAMCET 1983]

\[{{\tan }^{-1}}\left( \frac{49}{29} \right)\]

\[2{{\tan }^{-1}}\left( \frac{1}{3} \right)+{{\tan }^{-1}}\left( \frac

1.	\[2{{\tan }^{-1}}\left( \frac{1}{3} \right)+{{\tan }^{-1}}\left( \frac{1}{7} \right)=\] [EAMCET 1983]
A.	\[{{\tan }^{-1}}\left( \frac{49}{29} \right)\]
B.	\[\frac{\pi }{2}\]
C.	0
D.	\[\frac{\pi }{4}\]
Answer» E.

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\[2{{\tan }^{-1}}\left( \frac{1}{3} \right)+{{\tan }^{-1}}\left( \frac{1}{7} \right)=\] [EAMCET 1983]

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