Question

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In any ∆ ABC , prove that

a³cos ( B-C ) + b³cos ( C-A ) + c³cos ( A-B ) = 3abc

Answer 1

hello frnd gm have a great day

here's the answer to the given question hope ull get the answer to the given question and mark as brainliest one......✌✌✌✌

last step is abc+abc+abc= 3 abc

Answer 2

Answer:

HEY MATE YOUR ANSWER IS HERE

. 3 abc is the answer

I think so

MARK AS BRAINLIEST ANSWER

AND ALSO GIVE THANKS