名校
解题方法
1 . 已知平面向量
与
的夹角为
,若
恒成立,则实数
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14dbc242644d37708634ada0942b1463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b1f460f99efaf485ca6378ad726e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2024-05-21更新
|
275次组卷
|
2卷引用:重庆市朝阳中学2023-2024学年高一下学期期中考试数学试题
名校
解题方法
2 . 非零向量
,
满足
,若
,则
,
的夹角为( )
![](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/19f1100340bc2283937d44abaabc28a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab14f1db85f43583c37c416c1bcacd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
3 . 平面向量
满足
,且
,则
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fddc1f1c50aab4de7fff286d691b97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee4ee8a83cc9b6248ab90ab5e66d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a86928b291ba08244adbdc83fa51c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7a408f11507091b66107950158088e.png)
您最近一年使用:0次
解题方法
4 . 已知向量
与
是非零向量,且满足
在
上的投影为
,
,则
与
的夹角余弦值为( )
![](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/3143307ad0ba4a631eac04e814993655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f1ca48b024b9ea5dc5a2f708967dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c5090e792f2bc5057182bd97eb5508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
5 . 已知向量
,
满足
,
,求:
(1)
;
(2)向量
与
的夹角的余弦值.
![](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/d794bd359d217bbb529b2958dae72b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec40ad7422ad5ca80f13c814b331c9f8.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e6f98f23fea7db0f74897928024ca0.png)
(2)向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
您最近一年使用:0次
解题方法
6 . 已知向量
,
,则下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43fa9307f35580493bf435ac6a464b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d8a9d43534086239f4db84e8a2d8cb.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
解题方法
7 . 已知向量
满足
.
(1)证明
.
(2)求向量
与
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf03d6199158d02c21a888694f1f281.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e06d7ced08b9fc3bd6da843ef8789495.png)
(2)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa907edb8cb0795fe8c42eba3ad5b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1175c84073cdd042a1074d478fb3f2c.png)
您最近一年使用:0次
24-25高一上·全国·课后作业
解题方法
8 .
. ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcf6de6d0d61b174201fef3bd85e67b.png)
您最近一年使用:0次
名校
9 . 互相垂直且有公共原点的两条数轴构成平面直角坐标系.如果坐标系中两条坐标轴不垂直,那么这样的坐标系就称为斜坐标系.如图,设
是平面内相交成
角的两条数轴,
分别是与
轴、
轴正方向同向的单位向量.若向量
,则把有序数对
叫做向量在斜坐标系
中的坐标.
,求
;
(2)若
与
的夹角记为
,求
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c092d69df76faf1e2133dc96b466ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5253a9a71037d60059b60237824193b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff1b27f67a2190739f8fe8d71ad22652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b39413539656b05f7f5ec6e3fe0b0a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe98724f0d478f589425ac0b7b3066a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
解题方法
10 . 设
为双曲线
的上、下焦点,点
为
的上顶点,以
为直径的圆交
的一条渐近线于
两点,若
,则
的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be8df665f287ebc58f9ace14a8a741e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0897c812d139212095773a19dc4ea464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次