Let \( f(x)=\sin \left(\tan ^{-1} x\right) \). Then \( [f(-\sqrt{3}...

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Let \( f(x)=\sin \left(\tan ^{-1} x\right) \). Then \( [f(-\sqrt{3})] \), where [.] denotes the greatest integer function, is
\( \mathrm{P} \)
(a) \( -\frac{\sqrt{3}}{2} \)
(b) 0
(c) -1
(d) none of these
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