已知平面向量
,
,
满足
,且
,则
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29168fe500dd6e7014659fc80a774e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ccbe20a27a124f25fa60ec4b276a964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df431d7a6a19e2084e5415aa76562e11.png)
更新时间:2022-08-25 21:39:23
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填空题-单空题
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较易
(0.85)
解题方法
【推荐1】已知
,
,
与
的夹角是
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df8996d500c3385a20a45d3ce469cc5.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787379f7ff8d24be7eebfea1cfe956d9.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)
名校
解题方法
【推荐3】已知向量
在正方形网格中的位置如图所示.若网格纸上小正方形的边长为1,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc93fb81a3a0d5c9e4025ab87d0dc3b6.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc93fb81a3a0d5c9e4025ab87d0dc3b6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/bea22da1-8b9a-4fee-963a-8ca9863ab606.png?resizew=159)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
解题方法
【推荐2】已知
、
是不共线的两个单位向量,若
,则
与
的夹角为___________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
您最近一年使用:0次