解题方法
1 . 有下面四个关系式:①
;②
;③
;④
,其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458ba97de8e30180950b26624666ac3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993061a865fa5d3f706fb2bef0d684a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2141a819986c20a7d7414914dec686e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07b674cd5f21473fd920ad43ccced0e.png)
A.1 | B.2 | C.3 | D.4 |
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2 . 如图,
是半圆
的直径,
是弧
的三等分点,
是线段
的三等分点,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434845564fd5765244f8d1aa9240fa39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/c2676fae-59cd-4108-88de-4f8d1b917ba2.png?resizew=156)
(1)求
的值
(2)求
与
的夹角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434845564fd5765244f8d1aa9240fa39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/c2676fae-59cd-4108-88de-4f8d1b917ba2.png?resizew=156)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7dcdc182bdc7fab725bbdc01271f69.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12e6c508b528f9c9c311a6cdf5677b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe942dc55d43d618d9424849e7f1adc0.png)
您最近一年使用:0次
2020-02-29更新
|
449次组卷
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2卷引用:上海市宝山区宝山中学2017-2018学年高二上学期10月月考数学试题
3 . 已知向量
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f94ff15e5dfeae28465317f8afe7c5.png)
(1)若
时,求
的值
(2)若向量
与向量
的夹角为锐角,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4984318d967b210ce49f126794dad06b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f94ff15e5dfeae28465317f8afe7c5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574604b505e085f9494aa86d9b91024d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若向量
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
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名校
4 . 设
轴、
轴正方向上的单位向量分别是
,坐标平面上点列
分别满足下列两个条件:①
且
;②
且
;
(1)写出
及
的坐标,并求出
的坐标
(2)若
的面积是
,求
的表达式
(3)对于(2)中的
,是否存在最大的自然数
,对一切
都有
成立?若存在,求出
,若不存在,说明理由
![](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/eb4868d6790066750d6fc1b361b41bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce3fda051e46ce70ac23b01fc4cb46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d37882749aa24648a00cbf1b6ac504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af38ef62c4376afd666ab730476c4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79dcb1c9ae679a2c9d39cbe3aef4026e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aadc8ee4626512c25e8d9b2dcc58e47.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7179a1cec8c930d7c6afcaee2c4d908f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badbf0073031a679eb0caa32f42600ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22034385f3c155410cc757c7f2618fc3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641b2a6072bde5a30c6a4ff8684450f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbf4456c438046e0fe758af74a0ed24.png)
(3)对于(2)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b186ba8c8546dcc3d2b594b85752f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2020-02-29更新
|
476次组卷
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4卷引用:上海市宝山区宝山中学2017-2018学年高二上学期10月月考数学试题
名校
5 . 如图,在四形
中,
,
,若
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/d07748ae-5b69-419c-a346-64ccb2e3695f.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6ce4bf3650f828373cd4043ed4f013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686731f8126a5279aa86fdfde1e2e8f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b256c255da688399fce9e7d85671cd7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/d07748ae-5b69-419c-a346-64ccb2e3695f.png?resizew=135)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-11-07更新
|
881次组卷
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2卷引用:上海市交大附中2018-2019学年高二上学期期末数学试题
名校
6 . 已知平面上三个向量
,
,
,其中
.
(1)若
,且
,求
的坐标;
(2)若
,且
,求
与
夹角的余弦值.
![](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/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f242f038195884ef098a99a274a1a7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5b8eb2cdf5bbb1ac234e59ea80cd1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca0ed4d765007d0957fd85377f2cc43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e770edd95440471de2efaf11b94746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b8f658aea65feee34ed4b31cd37052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
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7 . 设两向量
、
,满足
,
,它们的夹角为60°,若向量
与向量
夹角为钝角,则实数t的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8315ec34019d719771152be2252106e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1df942703eedb05525d0ca06eef35f8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c2100ba6df2cee19fd515d79d8928d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b579246a8cecf9e93a161dd8519e5bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc88fd9769cede694f993e9c69df624.png)
您最近一年使用:0次
2020-01-16更新
|
1449次组卷
|
8卷引用:上海市上海交通大学附属中学2020-2021学年高二上学期开学考试数学试题
上海市上海交通大学附属中学2020-2021学年高二上学期开学考试数学试题上海市七宝中学2017-2018学年高二上学期10月月考数学试题海南省儋州川绵中学2021-2022学年高二上学期第二次月考数学试题湖南省湘潭市湘乡市名民实验学校2023-2024学年高二上学期入学考试数学试题人教A版(2019) 必修第二册 必杀技 第6章 6.2.4 向量的数量积河南省南阳市新野县第一高级中学校2021-2022学年高一下学期4月月考数学试题苏教版(2019) 必修第二册 必杀技 第9章 平面向量 9.2 向量运算 9.2.3 向量的数量积福建省连城县第二中学2023-2024学年高一下学期第一次月考数学试题
名校
8 . 给出下列命题:
(1)存在实数
使
;
(2)直线
是函数
图象的一条对称轴;
(3)
(
)的值域是
;
(4)若
,
都是第一象限角,且
,则
.
其中正确命题的序号为( )
(1)存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0250b8de2011e51fe16a0e33935d5c.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c366dcd7fdd83db8578a19499ffed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d437ff6de28aedaca72dc0ebf2b5c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c898670bd8db2d5ae16be99bcb463d.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c61cfbfd3bf888856b7dc9b2a84c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f968380bd05be0a88c4c389b344050c.png)
其中正确命题的序号为( )
A.(1)(2) | B.(2)(3) | C.(3)(4) | D.(1)(4) |
您最近一年使用:0次
2020-01-11更新
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340次组卷
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4卷引用:上海市吴淞中学2022-2023学年高二上学期期中数学试题
名校
9 . 已知向量
,若向量
之间的夹角为钝角,则实数
的取值范围是__________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c138310d68f313953a0eedff2ab9729b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116e2e7116a7b5cd0a912ec0699ca017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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10 . 已知有两个不相等的非零向量
,两组向量
和
均由2个
和3个
排列而成,记
,
表示
所有可能取值中的最小值,则下列命题中真命题的序号是_________________ (写出所有真命题的序号)
①
有5个不同的值;
②若
,则
与
无关;
③若
,则
与
无关;
④若
,则
;
⑤若
,
,则
与
的夹角为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116e2e7116a7b5cd0a912ec0699ca017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d652b98f2db3c3002c9ef6fdc060d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142505aaa7b64eaba9421bd0fea9e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be118f18e17dc2420b2c7021268c6bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494f173fed024b28d9e2bc7a96362d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ab55ce496dc3dfdf3f0c459ccf49cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494f173fed024b28d9e2bc7a96362d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fbd20f1e059a8a7f95435278b5ac81.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac408a5d33731ec9026a0a0e21d071f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494f173fed024b28d9e2bc7a96362d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fbd20f1e059a8a7f95435278b5ac81.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c58f8c034f39f3d2a3999d71c96913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4b77e77f7b2d0fc8187985a57c9902.png)
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a90612778afd628ab803cc879654743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d79aa686572fa83f7c3e5c7c3a4da55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
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