解题方法
1 . 已知向量
的夹角为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f442fa5dc6583fb08a9c7043b62523.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9855cf6af0b80638432fe8a1372ea6cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f442fa5dc6583fb08a9c7043b62523.png)
您最近一年使用:0次
2022-03-29更新
|
320次组卷
|
3卷引用:山西省孝义市2021-2022学年高一下学期第一次月考数学试题
名校
2 . 已知向量
与
的夹角
,且
,
.
(1)求
,
;
(2)求
与
的夹角的余弦值.
![](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/5d57678b93f1dcb18d4cbb33ff70bce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9936a46cc891744d4600f76bb92b694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939955fcd19578dc8f37415c60b187ab.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0fe4d834e8eaca89ceaf9c64cdabd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c250094127e2b3c878d68213b60407.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b91254db5ff748150f449c5cdd256c.png)
您最近一年使用:0次
2022-03-27更新
|
467次组卷
|
2卷引用:山西省大同市第二中学校2021-2022学年高一下学期期中数学试题
解题方法
3 . 如果不共线向量
满足
,那么向量
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208ecedef8d0525922a69ac3ae8d7f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d108e523626be0b40be9b3543ce12524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4e49d17d4ad440d37c6f4bc8daba25.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 在
中,设
,
,且
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc2c62290eb2fb969f9dd68d3d99d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae92f0c583cc9daf980a8621ad96aef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f18996bd00253c3ad9f91780103affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df42687a73cb92e92a3cb6e54f1edb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5303a18dfa0bf58161bf741d9bef8a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2caa17f7e44524a74bd90d5caefd29.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
5 . 若
,
,则
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b26ce5cec4162f1cfd2234f6904b313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ab8add168dee6309f35ccf022b2502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415f018664387b9363fe86e65c1d229e.png)
您最近一年使用:0次
名校
解题方法
6 . 已知向量
,其中
,且
,则向量
与
的夹角为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27bd29ca7ef74e563f80be8d55c6e35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65c5f92b8fff9bf8d4254a09ae4b3e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
2022-03-24更新
|
411次组卷
|
3卷引用:山西省山西大学附属中学2021-2022学年高一下学期3月月考数学试题
名校
解题方法
7 . 已知向量
,
夹角为
,且
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad8773f031a1e35117e1b7b8132d097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf396bde8b5aecf43c5a21a0bfd2f3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9684cd10a15236bde52b355ac0806975.png)
A.3 | B.![]() | C.4 | D.5 |
您最近一年使用:0次
2022-03-24更新
|
2090次组卷
|
7卷引用:山西省山西大学附属中学2021-2022学年高一下学期3月月考数学试题
山西省山西大学附属中学2021-2022学年高一下学期3月月考数学试题福建省四地市2022届高三第一次质量检测数学试题1福建省四地市2022届高三第一次质量检测数学试题2(已下线)二轮拔高卷06-【赢在高考·黄金20卷】备战2022年高考数学模拟卷(新高考专用)(已下线)押新高考第7题 平面向量-备战2022年高考数学临考题号押题(新高考专用)北京市陈经纶中学2023届高三下学期综合练习一(开学考试)数学试题(已下线)6.2.4 向量的数量积 (精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)
解题方法
8 . 已知
,
.
(1)若
,求
与
夹角的正弦值;
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84790c4187b83cc49af4e4477d62eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621f15abca91ddffe81c9fec9577ae4f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1cc86b7ff004a6ab4f88b7af2d58da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解题方法
9 . 在四边形
中,
,
,且
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde654b8bf0fb3f49acb19a8f4a1e48f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3369669d96878c93f35be6cf86cedec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8cac00fa020c20c7b5b9f9a25487eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e4497a51b4f204df0f149fe6192b07.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-03-22更新
|
484次组卷
|
3卷引用:山西省2021-2022学年高一下学期3月联考数学试题
解题方法
10 . 在平行四边形
中,已知
,
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b08895d449fc3930fb50c0fa5c2f072.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a1d0742de782740ed9c29f42c01fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f883b4d4cb5cbb7c50e0bd230aee0cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b08895d449fc3930fb50c0fa5c2f072.png)
您最近一年使用:0次