在长方体
中,设
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458c11ae43c211771edd7988f9853306.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d64fc81c857b124268609a8beb77b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458c11ae43c211771edd7988f9853306.png)
更新时间:2020-11-15 06:24:23
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【知识点】 空间向量数量积的应用
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填空题-双空题
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较易
(0.85)
名校
【推荐1】已知
是空间单位向量,
,若空间向量
满足:
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6498305271f9cb02be451243d8f1bc9c.png)
_______ ,对于任意
,向量
与向量
所成角的余弦值最大值为_______ .
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填空题-单空题
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【推荐2】已知
,
均为空间单位向量,且它们夹角为
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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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您最近一年使用:0次