Math, asked by Yasaryoosufa1714, 1 year ago

Prove that cos 2a - cos 2b + cos 2c = 1 - 4 sinacosbsinc

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Answered by OM7744

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?#(;₹+9+;3;38₹-&12)₹₹93 ₹-7₹(#92-183-8#9++33)_+6

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