由√3sinAsinC-cosAsinC-sinC=0 又 sinC不等于0怎么得到sin(A-π/6)=1/2
由√3sinAsinC-cosAsinC-sinC=0 又 sinC不等于0怎么得到sin(A-π/6)=1/2
數(shù)學(xué)人氣：650 ℃時間：2020-05-28 19:17:50
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