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sinA.sin(B – C) + sinB.sin(C – A) + sinC.sin(A –B)
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sinA.sin(B – C) + sinB.sin(C – A) + sinC.sin(A –B)
Questions (1)
sinA.sin(B – C) + sinB.sin(C – A) + sinC.sin(A – B) = 0
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