平面向量
与
的夹角为
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eadb79c0238e2c545eee4fea2a07003.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6234d132ead5cf8194883f1b3fe22622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d852f97dc7e5afcaac57ee7b0b3303f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eadb79c0238e2c545eee4fea2a07003.png)
更新时间:2018-07-01 10:49:26
|
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解题方法
【推荐1】已知
,
与
的夹角是90°,
,
,
与
垂直,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae5c0a079d49b7e4a8a929daf5d2c6a.png)
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【推荐2】设
是直线
上的定点,
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【推荐1】设点M是线段BC的中点,点A在直线BC外,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62c0075103e2b733271d9e8d6b298ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19e54071a8df06f3b7ca62cb99c1c9d7.png)
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【推荐2】已知非零向量
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
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您最近一年使用:0次