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Grade: 11 

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

Answers : (1)

Saurabh Koranglekar
askIITians Faculty
8397 Points 
							576-1921_1.PNG
one year ago
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