已知向量
两两夹角为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0d113b524adcbad8277ff9881b7f57.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d501ad0f8213a9ff6c70eee7f942d250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0d113b524adcbad8277ff9881b7f57.png)
更新时间:2023-08-13 09:03:51
|
【知识点】 空间向量数量积的应用
相似题推荐
填空题-单空题
|
较易
(0.85)
名校
【推荐1】平行六面体ABCD-A1B1C1D1中,向量
两两的夹角均为60°,且
=1,|
|=2,|
|=3,则|
|等于_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e54736b0fc6db35e438a1d981db4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5639d8ad3f09809ac6b1a39160a0a0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d036188ce294e3c7427d0b7d2294fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe6c2a6bd48e459ddb61de5899e42391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba9b52e90777009ebe67217750ea26a.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐2】已知
,
,
为空间两两垂直的单位向量,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9979c9be755ac4fe5ba3a72850df7f9c.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc2ce7e7b90c9a4975d3d69ca98c9b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d52501977a0c7f823c7853a7e33024a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce06860ef7c66ff4d27430fd421b2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bec822b8ecab0c51cfe60728eaacc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e5f6ea4ed889523e3c6e2ffdb4ca95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9979c9be755ac4fe5ba3a72850df7f9c.png)
您最近一年使用:0次