If A+B+C=22/7Prove that -. Cos^2 a/2 + cos^2 b/2+ cos^2 c/2=2 (1+ sin a/2. + Sin b/2 + sin c/2 )

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Saurabh Koranglekar · Answer

Dear student Lhs = 3*(3/4 ) Keeping all angles 60 like for an equilateral triangle Rhs = 2*(1+ 3/2) = 5 Kindly check and repost correct question Regards

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If A+B+C=22/7Prove that -. Cos^2 a/2 + cos^2 b/2+ cos^2 c/2=2 (1+ sin a/2. + Sin b/2 + sin c/2 )

If A+B+C=22/7Prove that -. Cos^2 a/2 + cos^2 b/2+ cos^2 c/2=2 (1+ sin a/2. + Sin b/2 + sin c/2 )

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If A+B+C=22/7Prove that -. Cos^2 a/2 + cos^2 b/2+ cos^2 c/2=2 (1+ sin a/2. + Sin b/2 + sin c/2 )

If A+B+C=22/7Prove that -. Cos^2 a/2 + cos^2 b/2+ cos^2 c/2=2 (1+ sin a/2. + Sin b/2 + sin c/2 )

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