If \( 0x1 \), then \( \sqrt{1+x^{2}}\left[\left\{x \cos \left(\cot ...

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If \( 0x1 \), then \( \sqrt{1+x^{2}}\left[\left\{x \cos \left(\cot ^{-1} x\right)\right.\right. \)
\( \left.+\sin \left(\cot ^{-1} x\right) \xi^{2}-1\right]^{1 / 2} \) is equal to
(2008, 3M)
\( \mathrm{P} \)
(a) \( \frac{x}{\sqrt{1+x^{2}}} \)
(b) \( x \)
(c) \( x \sqrt{1+x^{2}} \)
(d) \( \sqrt{1+x^{2}} \)
VV
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