已知
的三边长分别为
,
,
,且最大内角是最小内角的2倍,则最小内角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7084b7c5564061fdd5d65e07f9692d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210c40f24741db070dfb0d2710afcd63.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-04-20 16:54:38
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名校
【推荐2】已知在
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