Sin (B+2C)+ Sin (C+2A) + Sin (A+2B)=4 Sin (B-C)/2 Sin (C-A)/2). Sin (A-B/2. see class 10 opt math

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Sin (B+2C)+ Sin (C+2A) + Sin (A+2B)=4 Sin (B-C)/2 Sin (C-A)/2). Sin (A-B/2. see class 10 opt math

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Sin (B+2C)+ Sin (C+2A) + Sin (A+2B)=4 Sin (B-C)/2 Sin (C-A)/2). Sin (A-B/2. see class 10 opt math

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Sin (B+2C)+ Sin (C+2A) + Sin (A+2B)=4 Sin (B-C)/2 Sin (C-A)/2). Sin (A-B/2. see class 10 opt math