\( f(x)=\sin ^{-1} x+\sec ^{-1} x \) is defined for (A) \( x \in[-1,1] \) (B) \( x \in\{-1,1\} \...

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\( f(x)=\sin ^{-1} x+\sec ^{-1} x \) is defined for
(A) \( x \in[-1,1] \)
(B) \( x \in\{-1,1\} \)
(C) \( x \in[0,1] \)
(D) None of these
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