设向量
满足
,则
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/955c7ce3f27864e2d3608396ed19a164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202d6fbbf650e2524ddac4c56b0f015e.png)
更新时间:2017-03-12 22:33:34
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【知识点】 平面向量数量积的运算
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填空题-单空题
|
容易
(0.94)
名校
解题方法
【推荐1】已知向量
的夹角为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142fba477a529bf434885c8827327125.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb371bd7728c6d6a16533a93924ad998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a070baf29985700b7697352785a2caf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142fba477a529bf434885c8827327125.png)
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填空题-单空题
|
容易
(0.94)
【推荐2】在平面直角坐标系中,
分别是与
轴正方向同向的单位向量,平面内三点A、B、C满足,
,
.若A、B、C三点构成直角三角形,则实数m的值为_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d0f5edd2ad69fa56e7782b85bba717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://img.xkw.com/dksih/QBM/2015/3/24/1572024850006016/1572024855830528/STEM/6d507d60bbf349eb9b441bc4aba94c48.png?resizew=77)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e88b53885814d5010b2f6b37629af.png)
您最近一年使用:0次