已知三角形ABC中的内角A,B,C的对边分别为a,b,c,定义向量m=(2sinB,-根号3),定量n=(cos2B,2cos平方B/2-1)且定量m//定量n (1)求角B的大小; (2)如果b=2,求三角形ABC的面积的最大值是?
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![已知三角形ABC中的内角A,B,C的对边分别为a,b,c,定义向量m=(2sinB,-根号3),定量n=(cos2B,2cos平方B/2-1)且定量m//定量n (1)求角B的大小; (2)如果b=2,求三角形ABC的面积的最大值是?](/uploads/image/z/3684877-61-7.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%E7%9A%84%E5%86%85%E8%A7%92A%2CB%2CC%E7%9A%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%2C%E5%AE%9A%E4%B9%89%E5%90%91%E9%87%8Fm%3D%282sinB%2C-%E6%A0%B9%E5%8F%B73%29%2C%E5%AE%9A%E9%87%8Fn%3D%28cos2B%2C2cos%E5%B9%B3%E6%96%B9B%2F2-1%29%E4%B8%94%E5%AE%9A%E9%87%8Fm%2F%2F%E5%AE%9A%E9%87%8Fn+%EF%BC%881%EF%BC%89%E6%B1%82%E8%A7%92B%E7%9A%84%E5%A4%A7%E5%B0%8F%3B+%282%29%E5%A6%82%E6%9E%9Cb%3D2%2C%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E9%9D%A2%E7%A7%AF%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E6%98%AF%3F)
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