1 . 已知
,且
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae3d587a06f3ce73f987708b5908b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb6118172f384a565afcdfd84e9cdb0.png)
A.5 | B.![]() | C.![]() | D.![]() |
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2023-12-11更新
|
2475次组卷
|
3卷引用:湖南省株洲市世纪星高级中学2023-2024学年高一下学期3月月考数学试题
2 . 如图所示,在矩形
中,
,点
为
的中点,且
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26acad4ef0d0f836822846f569bb106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e940847add09ef9f2624fb5dc7471c6e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-07-17更新
|
380次组卷
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2卷引用:湖南省湘潭市岳塘区2023-2024学年高一下学期6月质量检测卷数学试题
名校
解题方法
3 . 已知向量
满足
与
的夹角为
,当实数
为何值时,
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc11138b7665b761ff4da338a391f5ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abea181e724a47e82cd16561df795e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105285d408e25320cd33170e91a11e5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75326f4442279bf8011bfed7b87f41d2.png)
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2023-07-06更新
|
285次组卷
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2卷引用:湖南省张家界市2022-2023学年高一下学期期末联考数学试题
名校
4 . 如图,圆心为C的定圆的半径为3,A,B为圆C上的两点.
(1)若
,当k为何值时,
与
垂直?
(2)若
的最小值为2,求
的值;
(3)若G为
的重心,直线l过点G交边
于点P,交边
于点Q,且
,
.证明:
为定值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/9785ae46-35c8-4c6f-8312-728689c016ae.png?resizew=154)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d33d7bbd89950f7ba1bf5a855b0ab9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1144b19a3d032433b77c8e07dca969a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b683b0c4ccd5747b8c41d4ed30d1e088.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7464972070329b8372b7c77885f77a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d401876b078e318413b8ad876c54b7be.png)
(3)若G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73ba7fd5c3f0fbfb7325dbc1e1c1879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6f8a5f095834d20f66ffbd1cdd40bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587b693b82241eb9c32cdbb96c209f33.png)
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2023-07-06更新
|
649次组卷
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2卷引用:湖南省岳阳市岳阳县第一中学2022-2023学年高一下学期期末数学试题
解题方法
5 . 已知非零向量
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd01707e8d32f277b83c007a5b15bd7.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ef55542504e8d147448cbfb6eaad7a.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f87012dc0945e052033a00992fe5ec2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd01707e8d32f277b83c007a5b15bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ef55542504e8d147448cbfb6eaad7a.png)
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2023-06-28更新
|
249次组卷
|
3卷引用:湖南省湘潭市岳塘区2023-2024学年高一下学期6月质量检测卷数学试题
名校
解题方法
6 . 已知平面直角坐标系中,点
为原点,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
(1)若
,
且方向相反,求
的坐标;
(2)若
,
与
的夹角为
,且向量
与
互相垂直,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b6b89baeb902693be30b7c5da5e450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25aa7c6c88372a7544f15d631c4982c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2396cac4b185cf1f1a67dad9248481c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f7a86fe59d902cba2447a49f76a142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/247da0faccddc6b7e995f5a36c37ca20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2023-04-18更新
|
318次组卷
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2卷引用:湖南省湖湘教育三新探索协作体2022-2023学年高一下学期4月期中联考数学试题
名校
解题方法
7 . 已知
,
,且
与
夹角为
,求:
(1)
;
(2)
与
的夹角的余弦值;
(3)若向量
与
垂直,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787379f7ff8d24be7eebfea1cfe956d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2396cac4b185cf1f1a67dad9248481c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3db87f99222f1705e122a6bd329c9f1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
(3)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa53e6f54e190da611f9f18ee20076d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33044e818d70b6b8b968a9a69a4811d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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名校
8 . 下列说法正确的是( )
A.若![]() ![]() ![]() |
B.![]() ![]() |
C.![]() |
D.若![]() ![]() ![]() ![]() |
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2023-04-08更新
|
603次组卷
|
2卷引用:湖南省长沙市明德中学2022-2023学年高一下学期期中数学试题
名校
9 . 下列论断中,正确的有( )
A.![]() ![]() ![]() |
B.若奇函数![]() ![]() ![]() ![]() |
C.若函数![]() ![]() ![]() ![]() ![]() ![]() |
D.向量![]() ![]() ![]() ![]() ![]() ![]() |
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2023-04-07更新
|
417次组卷
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2卷引用:湖南省长沙市第一中学2022-2023学年高一下学期第一次阶段性检测数学试题
10 . 点
是
所在平面内的一点,当
且
时,
的形状为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699b82be749af3fa36f1fed5122591a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a941eb3cf3e58d05c37ed61e98dd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.等腰三角形 | B.直角三角形 | C.等边三角形 | D.等腰直角三角形 |
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