1.设锐角三角形ABC的内角ABC的对边分别为abc,且a=2bsinA,⑴.求∠B,⑵.若三角形ABC的面积为√3,c=2,求a2.在△ABC中,∠ABC所对的边为abc,若(√3*b*c)*cosA=acosC求cosA额 顺便能找个长期在线的么,估计以后
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![1.设锐角三角形ABC的内角ABC的对边分别为abc,且a=2bsinA,⑴.求∠B,⑵.若三角形ABC的面积为√3,c=2,求a2.在△ABC中,∠ABC所对的边为abc,若(√3*b*c)*cosA=acosC求cosA额 顺便能找个长期在线的么,估计以后](/uploads/image/z/1722337-25-7.jpg?t=1.%E8%AE%BE%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%86%85%E8%A7%92ABC%E7%9A%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%BAabc%2C%E4%B8%94a%3D2bsinA%2C%E2%91%B4.%E6%B1%82%E2%88%A0B%2C%E2%91%B5.%E8%8B%A5%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BA%E2%88%9A3%2Cc%3D2%2C%E6%B1%82a2.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0ABC%E6%89%80%E5%AF%B9%E7%9A%84%E8%BE%B9%E4%B8%BAabc%2C%E8%8B%A5%EF%BC%88%E2%88%9A3%2Ab%2Ac%EF%BC%89%2AcosA%3DacosC%E6%B1%82cosA%E9%A2%9D+%E9%A1%BA%E4%BE%BF%E8%83%BD%E6%89%BE%E4%B8%AA%E9%95%BF%E6%9C%9F%E5%9C%A8%E7%BA%BF%E7%9A%84%E4%B9%88%2C%E4%BC%B0%E8%AE%A1%E4%BB%A5%E5%90%8E)
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