如图,非零向量
,且
,C为垂足,设向量
,则
的值为____________ (用
与
的数量积和其模表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ed0f18ec6f416353586da01adb3746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad481ad2a1a3126e20ead668ce4131ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/816dbc71144a8b06251ac824d6651b75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/5ba92353-2193-43a3-a57d-bd00e1ffc165.png?resizew=129)
更新时间:2020-10-15 16:24:34
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【推荐2】如图,在等腰直角
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【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a18427949896e8c6073255731c84c6.png)
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【推荐2】若向量
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______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
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