名校
解题方法
1 . 向量
是单位向量,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b8769d7bf2001355155359c70d8566.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082c6926889f84f438ea35f70bf05f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b8769d7bf2001355155359c70d8566.png)
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2022-03-18更新
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1009次组卷
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5卷引用:云南省普洱市2022届高三上学期期末统测数学(文)试题