解题方法
1 . 已知正三角形ABC的边长为1,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a9d11c1fdda8f3bb2ef921bc75f816.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a9d11c1fdda8f3bb2ef921bc75f816.png)
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2022-11-20更新
|
380次组卷
|
3卷引用:新疆乌鲁木齐市第六十一中学2022-2023学年高一下学期期中考试数学试题
名校
2 .
为等边三角形,且边长为2,则
与
的夹角大小为___________ ,若
,则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ee0975dc3af664349ad2691fadf560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e1c795c90d6bc673ee5f0f0548d002.png)
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2022-06-02更新
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1033次组卷
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6卷引用:新疆库车市第二中学2023-2024学年高二上学期开学考试数学试题
解题方法
3 . 已知向量
与
的夹角为120°,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31efdb77e351b6737346f9c360373cf4.png)
______ .
![](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/cd18461fd9d77e6fa46a654f0ab540f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082c6926889f84f438ea35f70bf05f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31efdb77e351b6737346f9c360373cf4.png)
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2021-10-19更新
|
539次组卷
|
2卷引用:新疆乌鲁木齐市第三十六中学2022-2023学年高一下学期期中考试数学试题
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4 . 对于任意向量
,
,定义新运算“
”:
(其中
为
与
的夹角).利用这个新运算解决:若
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5551fb0492bc25596cabb007fe565389.png)
______ .
![](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/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba0ae7708c17219b9fc2342ac2899ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](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/4b9620b76a31e8cfef0cd6a2bdb10ffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9606a290f97902ee8c60813120edd00a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72d76fbbd1afa09aa65e149c195f32f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5551fb0492bc25596cabb007fe565389.png)
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2021-10-19更新
|
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2卷引用:新疆维吾尔自治区乌鲁木齐市第101中学2024届高三上学期8月月考数学(理)试题
名校
解题方法
5 . 已知单位向量
和
的夹角为
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e912b86e064e678ab34210f3fa02ef.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b28baf17059c56ee9ad1ae4814acd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b04618e5b2db68f2de6ba68972c505c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9a369efbdd774d3dc4dd9489396023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b08ff4d206c38619a8a2378c71c1e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a754bd0d4e223a58b18a3ba0f2919f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e912b86e064e678ab34210f3fa02ef.png)
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2020-12-19更新
|
217次组卷
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2卷引用:新疆维吾尔自治区乌鲁木齐市第十二中学2024届高三上学期9月月考数学(理)试题
名校
解题方法
6 . 已知向量
的夹角为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99db28b7a5a1b437b943e7f9ad9f894.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f604ee1a52a0f1156116672fad9c7d69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99db28b7a5a1b437b943e7f9ad9f894.png)
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2020-09-13更新
|
217次组卷
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8卷引用:新疆维吾尔自治区喀什第二中学2022-2023学年高一下学期3月月考数学试题
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7 . 已知
,
=4,
与
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc53054c400ea0a37251cc7f63402dfb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1624f865aa8d83b1696f8d59344c47a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d1384ad713e342ab90893143e82e07.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/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc53054c400ea0a37251cc7f63402dfb.png)
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2020-07-15更新
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2卷引用:新疆维吾尔自治区乌鲁木齐市第四十中学2024届高三上学期11月月考数学试题
名校
解题方法
8 . 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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69522947c998dc6865c483eb0321d649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e912b86e064e678ab34210f3fa02ef.png)
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2020-03-05更新
|
592次组卷
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4卷引用:新疆英吉沙县实验中学2024届高三上学期期中考试复习数学试题(一)
9 . 向量
满足:
,
与
的夹角为
,则
=_____________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24d0b72a5fba2b142ea6c5406ee947e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb14f09b4cbca42a886862ef9caac5c.png)
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2019-09-14更新
|
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2卷引用:新疆维吾尔自治区乌鲁木齐市第六十一中学2024届高三上学期10月月考数学试题
解题方法
10 . 如图,在正方形
中,
,
为
上一点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba209a52ba69335ae5c3ff8a6a84e3c.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235d314368f0e6620d1e9271d6266aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba209a52ba69335ae5c3ff8a6a84e3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/2606e48d-8933-458d-a803-40f416be66a1.png?resizew=120)
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2016-12-04更新
|
499次组卷
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4卷引用:新疆昌吉州行知学校2022-2023学年高一下学期期中考试数学试题