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cosb等于什么边比什么边
更新时间: 2021-06-06 05:05:44  

1、cosB是邻边比斜边,sinB是对边比斜边,tanB是对边比邻边。

2、余弦定理,欧氏平面几何学基本定理。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,勾股定理是余弦定理的特例。

关键词: cosb 等于 什么

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