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[" Example "(25" ,If "A+B+C=pi" then pro...

[" Example "(25" ,If "A+B+C=pi" then prove that "],[[sin(A+B+C),sin B,cos C],[-sin B,0,tan A],[cos(A+B),-tan A,0]|=0quad " [M.P."2009]],[" Solution: "]

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