Math, asked by Myloveshividi, 7 months ago

solve this question please write in fair copy

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Answered by bishtvineeta34

2

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ANSWER

∠A+∠B+∠C=180 ..[Angle sum property of a triangle]

∠B+∠C=180−∠A2∠B+∠C =90 − 2∠A

sin( 2B+C )=sin(90− 2A )=cos 2AHence Proved.

Answered by Snehpriyanshu

5

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i understand only.40%

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