In a ΔABC, if cotA cotB cotC > 0, then the Δ is

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Q: In a ΔABC, if cotA cotB cotC > 0, then the Δ is

(A) acute angled

(B) right angled

(C) obtuse angled

(D) does not exist

Sol. Since cotA cotB cotC > 0

cotA, cotB, cotC are positive

⇒ Δ is acute angled

Hence (A) is the correct answer.

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