已知
,
且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8e23423ba05ff0072a71738caa5d65.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77142b2449948ff656d6bb8038ff1d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ccaf40f8006b3ff56df29bf8006bf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8e23423ba05ff0072a71738caa5d65.png)
更新时间:2020-10-24 17:22:39
|
相似题推荐
填空题-单空题
|
较易
(0.85)
名校
解题方法
【推荐1】已知
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ee058d80bf1f695e71ad49beb81f81.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f4dcf415977dea53f52a85b6b82136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6298f5ea480c1db659fad4d4c658da47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016cca31459c8044a0cd77d2e079871a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ee058d80bf1f695e71ad49beb81f81.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐2】如图,以坐标原点O和
为两个顶点作等腰直角三角形OAB,使
,则向量
的坐标为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8950543cc2250609aa9e997687bdfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b8c8af42c8753c545999e6bb0db7db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/a6c8613b-36c4-49df-901f-b7595eee9ad2.png?resizew=173)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
名校
解题方法
【推荐2】已知向量
,若
,则
与
的夹角余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f998852515804eb78a4922560a8d8fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4d070c5939bb0ec4a9d40d7e3c7d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32da5659cf1a3ce75e3b6dde644faaba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
您最近一年使用:0次