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最佳答案:a/sinA=b/sinB=c/sinC
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最佳答案:a/sinA=b/sinB=c/sinC
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最佳答案:正弦定理:a/sinA=b/sinB=c/sinC变形:1,a/c=sinA/sinC a/b=sinA/sinC b/c=sinB/sinA2,a/b/c=s