1 . 在
中,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a1b57e1fbb6e5b8bc714778a8d2e78.png)
A.当![]() ![]() |
B.若![]() ![]() |
C.![]() |
D.当![]() ![]() ![]() ![]() ![]() |
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解题方法
2 . 已知
.
(1)求
与
的夹角;
(2)若向量
为
在
上的投影向量,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e395ca3cd8e7456e1b5960af27f874c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b970dbe07e6fd22ebe4fe0a56a784f.png)
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名校
解题方法
3 . 已知
均为单位向量,且
,则
与
的夹角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae951e0bb5a2a406f1572fc1e4964265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f763b02f28da467b8b945d83b7106641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-05-29更新
|
829次组卷
|
2卷引用:湖北省武汉市华中师范大学第一附属中学2023-2024学年高一下学期4月期中检测数学试题
名校
解题方法
4 . 如图所示,设
是平面内相交成
角的两条数轴,
分别是与
轴正方向同向的单位向量,则称平面坐标系
为
斜坐标系,若
,则把有序数对
叫做向量
的斜坐标,记为
.在
的斜坐标系中,
,则下列结论中,错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c092d69df76faf1e2133dc96b466ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d933cf641e034c2fb61b1f259773ba27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d311413261abe82807a41c49a568c13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e76b9ea1622645012f45db383c71b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412fe3dc36ce166ac4640ec3a9c12bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e186ebc624ebacde9a03b96289f1ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7a9f69095f6790d98cab3e55a01445.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() ![]() ![]() |
您最近一年使用:0次
5 . 对非零向量
,定义运算“(*)”:
,其中
为
与
的夹角,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfe06e39ed151db4d8e2cb9b50faeda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若Rt![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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名校
解题方法
6 . 两个单位向量
与
满足
,则向量
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d257f49dd753f391cab3f0322de8307e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3de0055300265e14d85bbaf35d23b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
7 . 已知平面非零向量
和单位向量
,若
与
的夹角为
与
的夹角为
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a6a5c98d78050766cfbc8214179e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92fb0321db0676af22be95f8a9cc9b38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576536967639b1821f5e3b07be02c3ce.png)
您最近一年使用:0次
2024-05-07更新
|
545次组卷
|
2卷引用:湖北省武汉市华中师范大学第一附属中学2023-2024学年高一下学期4月期中检测数学试题
8 . 已知平面向量
,
,
,若存在平面向量
,
,使得
,则
的最小值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7f14dfa9f463d57664c640102bb5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b8947476feba834a361ae8ae518136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa363070e9ec729ceb37e480e3552836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79d0d8f3a36fe5b832f6afcc4a02e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8798a9ef31a0571814a55dc6cf4de36.png)
您最近一年使用:0次
名校
9 . 下列关于平面向量的说法,其中正确的是( )
A.若![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
解题方法
10 . 如图,设
是平面内相交成
角的两条数轴,其中
,
,
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
在夹角为
的坐标系
中的坐标,记为
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c092d69df76faf1e2133dc96b466ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3caed74a0f657fc5b04d43a7106cfb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.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/e0fa242d7eac90a23c537b2ad7ef1978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91174b2336306191ba275a87864172b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5619040866277d0df071232ec83acac2.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若对任意的![]() ![]() ![]() |
D.若对任意的![]() ![]() ![]() |
您最近一年使用:0次