向量
满足
,且
,则
与
夹角的余弦值等于___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9c91af174ebe66c921f52db385a6c2.png)
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2004·全国·高考真题 查看更多[4]
更新时间:2022-11-09 18:51:06
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【推荐1】已知点
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【推荐2】在
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【推荐1】在边长为6的正
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