已知正三角形
的边长为
,设
,
.则
与
的夹角=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a9051445ebf6ae90423dc00b6102d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6addd7e4c82cce6e308c6b09e05e62ca.png)
20-21高三上·广东广州·阶段练习 查看更多[2]
更新时间:2023-12-20 20:58:42
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