(a+b+c)/(sinA+sinB+sinC)等于a/sinA+bsinB+csinC?是么
(a+b+c)/(sinA+sinB+sinC)等于a/sinA+bsinB+csinC?是么
數(shù)學(xué)人氣：784 ℃時(shí)間：2020-02-05 10:56:26
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是
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