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| 1. |
ntIn any triangle ABC, prove the following: a(cosB.cosC+cosA) = b(cosC.cosA+cosB) = c(cosA.cosB+cosC)n |
| Answer» ntIn any triangle ABC, prove the following: a(cosB.cosC+cosA) = b(cosC.cosA+cosB) = c(cosA.cosB+cosC)n | |