已知向量
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba3c6bd21d9c27a68b970f446f04d6df.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852e99865c5268123d48c3b7d53ad639.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba3c6bd21d9c27a68b970f446f04d6df.png)
更新时间:2023-03-15 18:19:31
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填空题-单空题
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名校
解题方法
【推荐1】已知向量
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff1cca0653d9f8f3eaa64e0d215047e.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
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填空题-单空题
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较易
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【推荐2】已知向量
的夹角为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49a5ac368612815adf548190a7024fe.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0941c045346b5809714b632e023816.png)
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您最近一年使用:0次
填空题-单空题
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较易
(0.85)
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【推荐1】已知
,
,
.则向量
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夹角的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422b023ba03e9ac621081923c8b1c42e.png)
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