\[{{\tan }^{-1}}\left( \frac{1}{11} \right)+{{\tan }^{-1}}\left( \frac{2}{12} \right)=\] [DCE 1999]

\[{{\tan }^{-1}}\left( \frac{33}{132} \right)\]

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

\[{{\tan }^{-1}}\left( \frac{132}{33} \right)\]

\[{{\tan }^{-1}}\left( \frac{1}{11} \right)+{{\tan }^{-1}}\left( \frac

1.	\[{{\tan }^{-1}}\left( \frac{1}{11} \right)+{{\tan }^{-1}}\left( \frac{2}{12} \right)=\] [DCE 1999]
A.	\[{{\tan }^{-1}}\left( \frac{33}{132} \right)\]
B.	\[{{\tan }^{-1}}\left( \frac{1}{2} \right)\]
C.	\[{{\tan }^{-1}}\left( \frac{132}{33} \right)\]
D.	None of these
Answer» E.

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\[{{\tan }^{-1}}\left( \frac{1}{11} \right)+{{\tan }^{-1}}\left( \frac{2}{12} \right)=\] [DCE 1999]

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