If in a \( \triangle A B C, \tan A+\tan B+\tan C=0 \), then \( \cot A \cot B \cot C= \) (A) 6 (B...

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If in a \( \triangle A B C, \tan A+\tan B+\tan C=0 \), then \( \cot A \cot B \cot C= \)
(A) 6
(B) 1
(C) \( \frac{1}{6} \)
(D) none of these
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