Cumplete solution set of \( \left[\cot ^{-1} x\right]+2\left[\tan ^...
Cumplete solution set of \( \left[\cot ^{-1} x\right]+2\left[\tan ^{-1} x\right]=0 \),
P where [.] denotes the greatest integer function, is equal
W to
(a) \( (0, \cot 1) \)
(b) \( (0, \tan 1) \)
(c) \( (\tan 1, \infty) \)
(d) \( (\cot 1, \tan 1) \)
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