已知在△ABC中,(1)若sinc+sin(B—A)=sin2A,则三角形的的形状 (2)若sinA=sinB+sinC/cosB+cosC,已知在△ABC中,(1)若sinc+sin(B—A)=sin2A,则三角形的的形状(2)若sinA=sinB+sinC/cosB+cosC,则三角形的的形
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![已知在△ABC中,(1)若sinc+sin(B—A)=sin2A,则三角形的的形状 (2)若sinA=sinB+sinC/cosB+cosC,已知在△ABC中,(1)若sinc+sin(B—A)=sin2A,则三角形的的形状(2)若sinA=sinB+sinC/cosB+cosC,则三角形的的形](/uploads/image/z/1692779-59-9.jpg?t=%E5%B7%B2%E7%9F%A5%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%EF%BC%881%EF%BC%89%E8%8B%A5sinc%2Bsin%EF%BC%88B%E2%80%94A%29%3Dsin2A%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E7%9A%84%E5%BD%A2%E7%8A%B6+%EF%BC%882%EF%BC%89%E8%8B%A5sinA%3DsinB%2BsinC%EF%BC%8FcosB%2BcosC%2C%E5%B7%B2%E7%9F%A5%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%EF%BC%881%EF%BC%89%E8%8B%A5sinc%2Bsin%EF%BC%88B%E2%80%94A%29%3Dsin2A%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E7%9A%84%E5%BD%A2%E7%8A%B6%EF%BC%882%EF%BC%89%E8%8B%A5sinA%3DsinB%2BsinC%EF%BC%8FcosB%2BcosC%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E7%9A%84%E5%BD%A2)
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