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cos60度等于多少啊
更新时间: 2020-10-28 00:00:00  

1、cos60°=1/2。

2、所谓cos60.即在直角三角形中,一个角为60度,它的邻边与斜边之比。

3、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。

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