已知向量
,
,则
在
上的投影的数量______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11fccfefc1964c70facccd4adfd6cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/468bb54bc89cce6f3cc1a177f622f546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
22-23高一下·辽宁朝阳·阶段练习 查看更多[2]
更新时间:2023-08-15 09:53:08
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【推荐1】如图,已知
为圆
的一条弦,且
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db6bf46cdcd6b8235220c5a29e5ed85.png)
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【推荐2】已知直角△ABC中,AB=2,AC=1,D为斜边BC的中点,则向量
在
上的投影为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd98a891fa65f2fc6688001b03185d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
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【推荐1】已知平面向量
,
,设向量
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12eea1298666dc178945ee8e8079457a.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951545269ce0231e77d223c74cd02296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4747c9d80ccfa1a07338d9e3626ae87e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3384df7610a6925b5c2a1bda73bb2e30.png)
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【推荐2】已知点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d295a4cc3a58f9f38ee98337313c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7291b3d921f595f28960abcdce6dfbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5545195ade2bda359e683715332e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/525560a384123569b6975a0c2d9dddbb.png)
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