\[f(x)=ta{{n}^{-1}}x+{{\tan }^{-1}}\left( \frac{1}{x} \right);g(x)=si{{n}^{-1}}x+co{{x}^{-1}}x\]are identical functions if

\[f(x)=ta{{n}^{-1}}x+{{\tan }^{-1}}\left( \frac{1}{x} \right);g(x)=si{

1.	\[f(x)=ta{{n}^{-1}}x+{{\tan }^{-1}}\left( \frac{1}{x} \right);g(x)=si{{n}^{-1}}x+co{{x}^{-1}}x\]are identical functions if
A.	\[x\in R\]
B.	\[x>0\]
C.	\[x\in [-1,1]\]
D.	\[x\in (0,1]\]
Answer» E.

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\[f(x)=ta{{n}^{-1}}x+{{\tan }^{-1}}\left( \frac{1}{x} \right);g(x)=si{{n}^{-1}}x+co{{x}^{-1}}x\]are identical functions if

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