1 . 已知
,
与
的夹角为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d0708898a48bf7b33d731c158cf5fe.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/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8afa91e56855a68924ac456c8b697.png)
A.3 | B.2![]() | C.![]() | D.4 |
您最近一年使用:0次
2020-03-16更新
|
399次组卷
|
3卷引用:湖南省益阳市2018-2019学年高二上学期期末数学(文)试题
名校
2 . 已知向量
的夹角为60°,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e182e383332e1523809e7f8262d5dacf.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019c62d43430ababccb0fe08a55c6ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76decaaae6975cc28f31c4d3d97493c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e182e383332e1523809e7f8262d5dacf.png)
您最近一年使用:0次
2020-03-03更新
|
175次组卷
|
2卷引用:湖南省湘西州2018-2019学年高一下学期期末数学试题
名校
3 . 已知向量
、
满足
,且
,则
为( )
![](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/27bd29ca7ef74e563f80be8d55c6e35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f3260487f2975e18be06df709ab39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07882aa0d4087bd4e551dbfa437e31d.png)
A.![]() | B.6 | C.3 | D.![]() |
您最近一年使用:0次
解题方法
4 . 已知向量
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723f8041b72d57302df050d6d34a9676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dab7ae607f12cbb5f1d449c6e2b8d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f01486427658a9ab2cfe2f98a3b1126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869327e4008bd54a12fd43fffd49b176.png)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
名校
解题方法
5 . 已知
,
,
.
(1)求
与
的夹角和
的值;
(2)设
,
,若
与
共线,求实数m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7f14dfa9f463d57664c640102bb5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eca8fb20438505791369da9abe4a804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5fa9e16c612a7466de65b42c7303250.png)
(1)求
![](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/b195aa36a3c2753ebf08cb464c52ad1e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d2508dfb97e413f3b6a1733e10bf3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a0b8c4a0c048d92197478711c97145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337ab4dc61186ca58bb0605cb6d02df0.png)
您最近一年使用:0次
2020-02-13更新
|
1130次组卷
|
7卷引用:湖南省长沙市第一中学2023-2024学年高一上学期期末考试数学试题
名校
解题方法
6 . 已知向量
满足
,
,且
在
方向上的投影与
在
方向上的投影相等,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28280aaac77be24aa72379e49b6f01e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d8578ba9c959a0229daa191ae9af9c.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/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b023a599ea979d946808f4d1e7b15f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 已知不共线的向量
,
,
,
.
(1)求
与
的夹角的余弦值;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0b40ab957abd03f1db03ddf71242fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ace13ebf9148c275e0b1f0ac5f5b6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95e2dfdc0717ecae216ac143387eb78.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b023a599ea979d946808f4d1e7b15f5.png)
您最近一年使用:0次
名校
8 . 设平面向量
,
,若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da662deb825201dc8f8c815e7da89131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2990de980163b613833bf634c6ba24a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a683d9cd5f84e07bc351819d9dd96df4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5945fc5ae3cf3d3d828b987582d562.png)
A.4 | B.5 | C.![]() | D.![]() |
您最近一年使用:0次
2018-11-13更新
|
1969次组卷
|
10卷引用:湖南省长沙市雨花区2017-2018学年高一下学期期末数学试题
湖南省长沙市雨花区2017-2018学年高一下学期期末数学试题广东省阳江市2016-2017学年高一下学期期末检测数学试题山东省淄博市淄川中学2018届高三上学期开学考试数学(文)试题【全国百强校】辽宁省实验中学2017-2018学年高一下学期期中考试数学试题【全国百强校】黑龙江省鹤岗市第一中学2019届高三上学期第二次月考数学(理)试题宁夏银川市宁夏大学附属中学2019-2020学年高三上学期第三次月考数学(文)试题甘肃省兰州市五十一中2018-2019学年高一下学期第一次月考数学试题(已下线)专题6.5 《平面向量》单元测试卷-2021年新高考数学一轮复习学与练四川省泸县第一中学2023届高三三诊模拟考试文科数学试题(已下线)专题06 平面向量-1
9 . 已知向量
夹角为60°,且
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02c4a5ad4b595f21dc338a2b8e85d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db0f724f732c7a64d9a2212911d88f3.png)
A.2 | B.3 | C.4 | D.![]() |
您最近一年使用:0次
名校
10 . 已知
,
均为单位向量,它们的夹角为
,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7df5d272bcef79e8858224694d433bf.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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7df5d272bcef79e8858224694d433bf.png)
您最近一年使用:0次
2018-07-02更新
|
440次组卷
|
4卷引用:湖南省怀化市2016-2017学年高一下学期期末考试数学试题