The range of \[f(x)=si{{n}^{-1}}x+{{\tan }^{-1}}x+{{\sec }^{-1}}x\] is

1.	The range of \[f(x)=si{{n}^{-1}}x+{{\tan }^{-1}}x+{{\sec }^{-1}}x\] is
A.	\[\left( \frac{\pi }{4},\frac{3\pi }{4} \right)\]
B.	\[\left[ \frac{\pi }{4},\frac{3\pi }{4} \right]\]
C.	\[\left\{ \frac{\pi }{4},\frac{3\pi }{4} \right\}\]
D.	None of these
Answer» D. None of these

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The range of \[f(x)=si{{n}^{-1}}x+{{\tan }^{-1}}x+{{\sec }^{-1}}x\] is

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