If A+B+C=180°
Sin(B+2C)+Sin(C+2A)+Sin(A+2B)=4Si n(B/2-C/2)Sin(C/2-A/2)Sin(A/2-B/2)...
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Mathematics, 17.03.2020 06:48 kayonapretty14p45995
If A+B+C=180°
Sin(B+2C)+Sin(C+2A)+Sin(A+2B)=4Si n(B/2-C/2)Sin(C/2-A/2)Sin(A/2-B/2)
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