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In any triangle ABC, cotA/2, cotB/2, cotC/2 are in ap then prove that cotA/2*cotC/2 = 3

In any triangle ABC, cotA/2, cotB/2, cotC/2 are in ap then prove that cotA/2*cotC/2 = 3

Grade:11

1 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
3 years ago
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