名校
解题方法
1 . 若
,则向量
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8886306ce9dabf95ed170a38f4a393d5.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
2024-06-10更新
|
837次组卷
|
2卷引用:北京市中国人民大学附属中学2024届高三下学期5月热身练习数学试题(三模)
名校
解题方法
2 . 已知向量
,
在
上的投影向量为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6fce004c47849c29ebd8d5d7c16e98.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22238115ca80d3911e87b7b992817f1.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/81cdfd82868aefda05f52913dfd762a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fe104fd11503cee654020a008e646a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6fce004c47849c29ebd8d5d7c16e98.png)
您最近一年使用:0次
解题方法
3 . 在
中,
,点
满足
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958b10401ad438432c6a1b4235020832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4816c834e130108d62168d94925b758a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d86a15aa105315efdca1bb1d3278b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
4 . 如图,在正方形
中,
,点
分别为
的中点,点
在
上,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fd8b2544107bbd01acb125d73e611c.png)
______ .
![](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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fd8b2544107bbd01acb125d73e611c.png)
您最近一年使用:0次
2024-04-24更新
|
1002次组卷
|
2卷引用:北京市丰台区2023-2024学年高三下学期综合练习(二)数学试题
解题方法
5 . 如图.已知矩形
中,
,
,
分别是
,
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd897da27ed7f7fb0036d86e5387260e.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58022e20e4bd2a6c25f3f3a2d14fb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd897da27ed7f7fb0036d86e5387260e.png)
您最近一年使用:0次
名校
解题方法
6 . 已知向量
满足
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c511a7e0600634b5d9ec0fd019860d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffdc62ae9b777f1c30e8a59e644150bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b51326344e1673d57041edc97e0fdf3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-04-09更新
|
1309次组卷
|
2卷引用:北京市海淀区2024届高三下学期期中练习(一模)数学试题
名校
7 . 已知正方形
的边长为2,点
满足
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfd73971fdf37e583990f32b46c49de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9148f778ce04136bab5385ac8bad6a9.png)
您最近一年使用:0次
名校
解题方法
8 . 在
中,
,
, 且
, 则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ba38822c95ef670c535eb5c76ddfa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a9d11c1fdda8f3bb2ef921bc75f816.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-29更新
|
1515次组卷
|
3卷引用:北京市门头沟区2023-2024学年高三下学期3月综合练习(一模)数学试卷
名校
解题方法
9 . 已知
为不共线的两个单位向量,
为非零实数,设
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec6fb9e0625b85be3103d317fbb0cca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1abdc197cab50e9b59fd74467aaf8ad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbae94f2dd5086f7ddbe18407a978e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0008252a35a0da66f4b5c5cbdb001d8d.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2024-03-23更新
|
820次组卷
|
4卷引用:北京市北师大附属实验中学2024届高三下学期3月零模数学试题
名校
解题方法
10 . 设
均为非零向量,则“
”是“对于任意的实数
,都有
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0990d3f07c740d47a5a75f470f53a51.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2023-05-30更新
|
1441次组卷
|
4卷引用:北京市师大附属中学2023届高三适应性练习数学试题