设三角形ABC的内角A、B、C的对应边分别是、a、b、c,且acosB=3,bsinA=4(1)求边长a(2)若三角形的面积S为10,求三角形的周长l
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![设三角形ABC的内角A、B、C的对应边分别是、a、b、c,且acosB=3,bsinA=4(1)求边长a(2)若三角形的面积S为10,求三角形的周长l](/uploads/image/z/2804565-21-5.jpg?t=%E8%AE%BE%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%86%85%E8%A7%92A%E3%80%81B%E3%80%81C%E7%9A%84%E5%AF%B9%E5%BA%94%E8%BE%B9%E5%88%86%E5%88%AB%E6%98%AF%E3%80%81a%E3%80%81b%E3%80%81c%2C%E4%B8%94acosB%3D3%2CbsinA%3D4%281%29%E6%B1%82%E8%BE%B9%E9%95%BFa%EF%BC%882%EF%BC%89%E8%8B%A5%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AFS%E4%B8%BA10%2C%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E5%91%A8%E9%95%BFl)
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