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[高二数学名师视频讲堂] 高二数学名师视频讲堂第2讲:余弦定理
高二数学名师视频讲堂第2讲:余弦定理。余弦定理,是描述三角形中三边长度与一个角的余弦值关系的数学定理。是勾股定理在一般三角形情形下的推广模式。2014-07-24 编辑:alice
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2014-07-24 编辑:alice