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prove that in the ABC triangle a = 2 * b * cos C i need an answer as fast as possible

prove that in the ABC triangle a = 2 * b * cos C 
i need an answer as fast as possible 

Grade:9

1 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
4 years ago
576-1708_1.PNG

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