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Questions  >>  CBSE XII  >>  Math  >>  Relations and Functions
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Q)

Let $\; f:R \rightarrow R$ be given as $\;f(x)=\tan x $. Then $\;f^{-1}(1)$ is

\begin{array}{1 1}(A)\;\frac{\pi}{4} & (B)\;{n\pi+\frac{\pi}{4}:n\in Z}\\(C)\;does\;not\;exist & (D)\;none\; of\; these\end{array}

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