解题方法
1 . 如图,在正方形网格中有向量
,
,
,若
,则( )
![](https://img.xkw.com/dksih/QBM/2022/2/14/2916157454950400/2916361227886592/STEM/8909c433-e82a-4733-b066-3128c818956c.png?resizew=127)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a60c0df4214d77fe2a7240504686fab6.png)
![](https://img.xkw.com/dksih/QBM/2022/2/14/2916157454950400/2916361227886592/STEM/8909c433-e82a-4733-b066-3128c818956c.png?resizew=127)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
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2022-02-14更新
|
209次组卷
|
2卷引用:山西省吕梁市2022届高三上学期第一次模拟数学(文)试题
名校
解题方法
2 . 桌面上有一张边长为2的正三角形的卡纸,设三个顶点分别为
,
,
,将卡纸绕顶点
顺时针旋转
,得到
、
的旋转点分别为
、
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e48d868645df7564b567db8e859b61.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3b9a20c31e397ae1dc8a44baf7de91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e48d868645df7564b567db8e859b61.png)
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2022-01-15更新
|
440次组卷
|
4卷引用:山西省吕梁市临县第一中学2022届高三上学期期末数学试题
山西省吕梁市临县第一中学2022届高三上学期期末数学试题广东省东莞市2022届高三上学期期末数学试题(已下线)专题03 平面向量基本定理及坐标表示-2021-2022学年高一《新题速递·数学》(人教A版2019)2023版 湘教版(2019) 必修第二册 过关斩将 第1章 1.5 向量的数量积 1.5.2 数量积的坐标表示及其计算
3 . 如图,在正方形
中,
分别是
的中点,若
,则
的值为
![](https://img.xkw.com/dksih/QBM/2017/5/7/1682053802385408/1683332463853568/STEM/234de78597ca46c1ba95ea937d26e7ac.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806cbb02e72668a8dba3edc2ee71d765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
![](https://img.xkw.com/dksih/QBM/2017/5/7/1682053802385408/1683332463853568/STEM/234de78597ca46c1ba95ea937d26e7ac.png?resizew=126)
A.![]() | B.![]() | C.1 | D.-1 |
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2017-05-09更新
|
963次组卷
|
2卷引用:山西省阳泉市2021届高三三模数学(文)试题
名校
4 . 在平面内将点
绕原点按逆时针方向旋转
,得到点
,则点
的坐标为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea1f5bdd213c7c3a571b4c38850bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b199d124fb9a5bc8438c9884f04534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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2017-03-17更新
|
427次组卷
|
3卷引用:2017届山西省晋中市高三3月高考适应性调研考试理数试卷
解题方法
5 . 如图,在矩形
中,
,点
为
的中点,点
在边
上,若
,则
的值是
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572844375056384/1572844381069312/STEM/d8bf60b7f9ab4f4e999c964d12c897fc.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd4fb83908d0cabf3cc17ea6ce4a3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8028e690e1360d7a019d84f68f70a3e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f651a0f32c32d43a5e629e6e3fd479.png)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572844375056384/1572844381069312/STEM/d8bf60b7f9ab4f4e999c964d12c897fc.png?resizew=161)
A.![]() | B.![]() | C.![]() | D.![]() |
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