在△OAB中,已知P为线段AB上的一点,若
,
,
,且
与
的夹角为60°,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa534f31f5d56d3f0b4cc3a29c1d630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811e40a3bb22a4ac38e4ff8c78077cec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612ced101f95eb7c9ea960cbff045dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eeb629a6f94d187154b9e0fba4eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987a2625dae99578e5c0e7b57d4a1c2f.png)
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12-13高三上·江苏盐城·阶段练习 查看更多[1]
(已下线)2012届江苏省阜宁中学高三第一学期第二次阶段考试数学
更新时间:2016-12-01 12:49:40
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【推荐1】
为平行四边形
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【推荐2】如图,矩形
中,点
在矩形边上运动,若
,
,则
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解题方法
【推荐1】已知向量
,
的夹角为
,若
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,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a767ad5d9c710e768dcdc69d6cf0fcd2.png)
__________ .
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【推荐2】已知向量
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解题方法
【推荐3】已知向量
与
的夹角为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e912b86e064e678ab34210f3fa02ef.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
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解题方法
【推荐2】已知向量
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