名校
解题方法
1 . 已知
单位向量,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2a91c0227b6b10d31d7bd5a122583c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6162a5016f245659468746746a69005.png)
A.3 | B.![]() | C.![]() | D.2 |
您最近一年使用:0次
名校
2 . 在平面直角坐标系中,已知
,
.
(1)若
,求实数
的值;
(2)若
,若向量
与向量
的夹角为锐角,求实数
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5618d27a4010782412bc0dbbda61d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6761671da84d62ef7257cd5461dc3ae2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd63e5e54d82bd8e74020821703c9ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db0f7c2997e89bb727b843070802a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988f87fb46274899a28b1a36b36e9bc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2022-09-11更新
|
526次组卷
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4卷引用:江西省新余市第一中学2022-2023学年高二(零班)上学期开学考试数学试题
名校
3 . 设
为单位向量,且
互相垂直,若
,
,则向量
在
方向上的投影为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61486ddcf3ab84b3f9e0993b4266fa39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac795cef9054ba62bd667576f92848a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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2023-01-06更新
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240次组卷
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5卷引用:上海市控江中学2018-2019学年高三上学期开学考试数学试题
名校
解题方法
4 . 已知是两个单位向量,
,且
,则
=
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2023-09-25更新
|
258次组卷
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6卷引用:重庆市四川外语学院重庆第二外国语学校2023届高三下学期开学考试数学试题
名校
5 . 已知向量
,
,若
,且
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f4dcf415977dea53f52a85b6b82136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f99645c5aa5800b219c4d9f0baebcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b0501f059aa908ede3c0fbc62f9d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f622a667018a0a1b7b9334909c136090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
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2023-01-05更新
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228次组卷
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2卷引用:四川省绵阳南山中学2023届高三下学期入学考试数学(理)试题
名校
解题方法
6 . 已知向量
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82277c80019996ebf1ac6e05e8418033.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-09-13更新
|
1112次组卷
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3卷引用:山西省汾阳市汾阳中学2020-2021学年高二下学期开学考试数学(文) 试题
山西省汾阳市汾阳中学2020-2021学年高二下学期开学考试数学(文) 试题山西省山西大学附属中学2019-2020学年高一下学期5月模块诊断数学试题(已下线)考点57 平面向量数量积(练习)-2021年高考数学复习一轮复习笔记
7 . 下列命题正确的是( )
A.已知![]() ![]() ![]() ![]() |
B.已知![]() ![]() ![]() ![]() |
C.设![]() ![]() ![]() ![]() |
D.已知![]() ![]() ![]() ![]() ![]() ![]() |
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名校
解题方法
8 . 已知
,
,且
与
的夹角
,
(1)求
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af88a7628c71d642d3a6df067c15f5.png)
(2)若
与
垂直,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f96512f96698efe080f3d62c3084cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ec7096fee04d80cabd9e831a90fae6.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/92723ed3e62865396c01531eba603a88.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af88a7628c71d642d3a6df067c15f5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba2b0627ff70b02aa16b007dc41794dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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9 . 若
为
所在平面内一点,且满足
,且
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08474d21b7feecd1213b757c42a8fc8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46a4e894ae759de1877c4d24cd135fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.等腰三角形 | B.直角三角形 |
C.正三角形 | D.等腰直角三角形 |
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2022-06-13更新
|
441次组卷
|
2卷引用:云南省保山市腾冲市第八中学2022-2023学年高二下学期开学考试数学试题
名校
解题方法
10 . 已知平面向量
,
为单位向量,
,若
,
垂直,则
,
的夹角为______ .
![](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/2076a85131634ad6b794cf70718fda7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
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2022-03-25更新
|
456次组卷
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2卷引用:河南省南阳市宛城区南阳市第一中学校2023届高三下学期开学考试文科数学试题