名校
1 . 已知平面向量
,
均为单位向量,若
,则向量
,
的夹角
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37564ec4e9e92485f1769e8ffaac31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef80f82aa7094a106e91faec6493b1f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37564ec4e9e92485f1769e8ffaac31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba77bce6ee231457e37639d961442f4e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知
是单位向量,
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978b03b4f123be830afcb90b4073bd96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5caab7e4f2c696139a078175bbae7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知向量
,
,
,若
与
的夹角为
,且
⊥
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca8284c833f7766754d15809b3879d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd738a9c0d92e69b26a7a8b40ae668e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80882fa22c23c7195dbb1cee9d5db5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ab7024f73ff0cb7e6a48197538a91e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 下列说法正确的有( )
A.若复数![]() ![]() ![]() ![]() |
B.若复数![]() ![]() ![]() ![]() |
C.若向量![]() ![]() ![]() ![]() |
D.若复数![]() ![]() ![]() |
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2024-06-13更新
|
183次组卷
|
2卷引用:湖北省襄阳市第四中学2024届高三下学期高考最后一次数学测试题
名校
解题方法
5 . 已知
和
是两个单位向量,若
,则向量
与向量
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/1cd522bfa5a73cc24b727dfb9662bdaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-06-13更新
|
272次组卷
|
2卷引用:山东省日照市2024届高三下学期校际联考(三模)数学试题
名校
6 . 在△ABC中,已知
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff400c098ae6bf6abd24651a5a21114e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255a4b9674f7d9c6a890927620be3193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7590a22611f3935d8e32eac956c2a4c1.png)
A.![]() | B.1 | C.2 | D.![]() |
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7 . 在等腰
中,
,点M为边BC的中点,用向量的方法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed46a014ece6a0830c7c8b8deb2c56e0.png)
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解题方法
8 . 设
是空间内不共线的三点,若
为线段
垂直平分线上任意一点,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a43de98bae99fbef34fef38987045d3.png)
____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f5e21d225bf3c159ddf3876fbb8fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adf8bccbc5113a6d8f85285c6dc28cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eca33a7f196ce4e2cb60c8b5a01c6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a43de98bae99fbef34fef38987045d3.png)
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解题方法
9 . 已知向量
满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a035c8861e9fa9369d20d6b531d88dc.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ae0d7b3266f32b6a916b6237b6b838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ed609602a35815d4b57642a65d6790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a035c8861e9fa9369d20d6b531d88dc.png)
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2024-06-12更新
|
1030次组卷
|
3卷引用:辽宁省沈阳市2024届高三教学质量监测(三)数学试题
名校
10 . 在
中,已知
,
,若
分别是
的三等分点,其中
靠近点
,记
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86c589939053ce21ce0a67cf40054a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad3066aadbe41d8fb72bceed2e9d297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f24ef72400d1eba4842046b6ba246b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4cb2e90e56e2563a28cb109261062f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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