1 . 已知O为坐标原点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c2b0f51c8029ee90245937a8a96989.png)
(1)若
为锐角,求实数
的取值范围;
(2)若
是以
为直角的直角三角形,求实数
的值并求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c2b0f51c8029ee90245937a8a96989.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
名校
2 . 已知:
是同一平面内的三个向量,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f242f038195884ef098a99a274a1a7.png)
(1)若
,且
,求
的坐标;
(2)若
,且
与
垂直,求
与
的夹角
.
(3)若
,且
与
的夹角为锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbea69783ef033bf837c403cf36ccd.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/b2ee3a0e0f06c77f9c6980d15073c693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d9d4998cf104d7e28f10888deb66c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b37b1b1c2803e723337c20b554c5cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666dd921a9619a13967d04b5710bf93b.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/c24095e409b025db711f14be783a406c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b766e1414ad7445839c7ac2b9becc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7447872b1ead17d89c0947b601cd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2019-12-04更新
|
1065次组卷
|
4卷引用:上海市泥城中学2018-2019学年高二上学期第一次月考数学试题
上海市泥城中学2018-2019学年高二上学期第一次月考数学试题上海市上海交通大学附属中学2015-2016学年高二上学期期末数学试题甘肃省武威第六中学2019-2020学年高一下学期第一次学段考试(期中)数学试题(已下线)第九章 平面向量(综合测试卷)-2021-2022学年高一数学10分钟课前预习练(苏教版2019必修第二册)
3 . 设两个向量
满足
与
的夹角为
,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/42503437fb44722722cd20835f11d233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaf48e9309a3dc7696eb686cdf32279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0ef0910f487aa62d02508013eb963d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc88fd9769cede694f993e9c69df624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解题方法
4 . 已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62430466e50da4a5bd32783040b04bfc.png)
(1)求
;
(2)当k为何实数时,
与
的夹角为钝角?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72570757db98eae7543a123d47d829e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62430466e50da4a5bd32783040b04bfc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a426c9d5ee25068b1a7cc223b47382.png)
(2)当k为何实数时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea1f268299d57e5362182760a5961af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3364b5989fa241b26266c0d96ab9714.png)
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16-17高二上·上海浦东新·阶段练习
名校
5 . 已知
,
,
与
的夹角为45°,若向量
与
的夹角为锐角时,则
的取值范围为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc9e508a2f476c8ade3562f0801ff57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ace13ebf9148c275e0b1f0ac5f5b6b1.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/1b7447872b1ead17d89c0947b601cd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f075f5f31c260c7ac96d58c23bd8997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-01-30更新
|
347次组卷
|
5卷引用:上海市华东师范大学第二附属中学2016-2017学年高二上学期第一次月考数学试题2
(已下线)上海市华东师范大学第二附属中学2016-2017学年高二上学期第一次月考数学试题2湖北省黄冈市蕲春县第一高级中学2020-2021学年高一下学期3月月考数学试题云南省大理州宾川县第四完全中学2020-2021学年高一4月月考数学试题湖北省黄冈市麻城市第二中学2020-2021学年高一下学期4月月考数学试题湖南省株洲市南方中学2020-2021学年高一下学期4月月考数学试题
6 . 已知直线y=2x上一点P的横坐标为a,有两个点A(-1,1),B(3,3),那么使向量
与
夹角为钝角的一个充分不必要条件是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d956b09c004ddf8bdf6669a8182e80ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e287cd7e75c3199af6f935492c947a.png)
A.-1<a<2 | B.0<a<1 | C.-![]() ![]() | D.0<a<2 |
您最近一年使用:0次
2018-06-26更新
|
318次组卷
|
2卷引用:沪教版(上海) 高三年级 新高考辅导与训练 第八章 向量 本章测试
7 . 设两个向量
,满足
,
的夹角为60°,若向量
与向量
的夹角为钝角,则实数
的取值范围为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad59ee7969f2a082ed53bdf0aaa748ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e767cd59ad5388bf5453205a8519a631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad59ee7969f2a082ed53bdf0aaa748ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963022da5770fc8d051cdc6fdac6ef06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a62d2b1971615e6e8d18bf3f89eedee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2018-08-13更新
|
981次组卷
|
5卷引用:上海市嘉定区第一中学2018-2019学年高二上学期期中数学试题
8 . 已知下列命题:①若
<0,则
与
的夹角为钝角;②a,b∈C,则“ab∈R”是“a,b互为共轭复数”的必要非充分条件;③一个骰子连续投2次,点数和为4的概率为
;④若n为正奇数,则6n+
+
+…+
被8除的余数是5,其中正确的序号是 .
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560152297472/1572560157835264/STEM/4ad45428828d4e08b9a688bdcf4c087e.png?resizew=30)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560152297472/1572560157835264/STEM/42a22b0572a3469aaf8a00dcade80830.png?resizew=10)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560152297472/1572560157835264/STEM/86f58b7b788f461896756637bbeeaf5e.png?resizew=10)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560152297472/1572560157835264/STEM/452566e28f734440bab28d450a130ae7.png?resizew=10)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560152297472/1572560157835264/STEM/919007a173c74efcb78fbabc27b756f4.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560152297472/1572560157835264/STEM/a86f4f2d0c3643649d06007a594049dc.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560152297472/1572560157835264/STEM/a9aeb48a3db741e99f9a1dd02b11783b.png?resizew=72)
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9 . 直线
与
的夹角的大小为 .(结果用反三角函数表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd6e61ebaedc137b5ed242f84c6f5d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c1180bef2dcf7a01380c1185519067.png)
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