已知三角形ABC中,a,b,c分别是角A,B,C的对边,且sin^2B+sin^2C-sinBsinC=sin^2A,a=根号下3求向量AB•向量AC的最大值
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![已知三角形ABC中,a,b,c分别是角A,B,C的对边,且sin^2B+sin^2C-sinBsinC=sin^2A,a=根号下3求向量AB•向量AC的最大值](/uploads/image/z/192175-7-5.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2Ca%2Cb%2Cc%E5%88%86%E5%88%AB%E6%98%AF%E8%A7%92A%2CB%2CC%E7%9A%84%E5%AF%B9%E8%BE%B9%2C%E4%B8%94sin%5E2B%2Bsin%5E2C-sinBsinC%3Dsin%5E2A%2Ca%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B3%E6%B1%82%E5%90%91%E9%87%8FAB%26%238226%3B%E5%90%91%E9%87%8FAC%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC)
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