Math, asked by donkadaprasadvandana, 7 months ago

Sigma b²-c²/a cos A is equal to

please answer

Answers

Answered by as7640733gmailcom

3

Answer:

Prove that in any triangleABC P.T (b2-c2)cotA + (c2-a2)cotB + (a2-b2)cotC = 0

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