1 . 设非零向量
与
的夹角为
,则
是
的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928087301c0628fba2a9cd3af14f34d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7278c5ded041cf586316c1eaa3274c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a26b016ffe80a2e5271d05375ea768d.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2 . 已知向量
,则向量
夹角的余弦值为____________________ .
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572031855812608/1572031861555200/STEM/619733f2d6e4414d8ce6b985e6a98fe4.png?resizew=136)
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572031855812608/1572031861555200/STEM/25f08df212c54d43ac0a058e68f910bc.png?resizew=32)
您最近一年使用:0次
13-14高三·重庆·阶段练习
3 . 设向量
,
,则向量
在向量
上的投影为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3306d808aaf5a16eb9b35afcd5ed5f95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffcc21ffa986fd2a5d15134490bd32a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
4 . 在三角形ABC中,角A,B,C的对边分别为a,b,c,且
.
(Ⅰ)求
的值;
(Ⅱ)若
,求向量
在
方向上的投影.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1745a1a88524ba69bb5c8450c0f9acd.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf43e61c864114e398f4168e1a167ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ba913238f9aaa01696586b618ac20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1da92a2fc2ce861e82f7192fe4e648f.png)
您最近一年使用:0次
2016-12-02更新
|
2244次组卷
|
9卷引用:重庆市大学城第一中学校2018-2019学年高一下学期第一次月考数学试题
重庆市大学城第一中学校2018-2019学年高一下学期第一次月考数学试题2013年全国普通高等学校招生统一考试文科数学(四川卷)(已下线)2014届人教版高考数学文科二轮专题复习提分训练17练习卷(已下线)2014届湖北省黄冈市高三5月适应性考试文科数学试卷2015-2016学年江苏省扬州中学高二上学期开学考数学试卷(已下线)江西省南昌市江西师大附中2019-2020学年高一下学期月考数学试题江西省南昌市南昌县莲塘第一中学2018-2019学年高一下学期第一次月考数学(文)试题江西师范大学附属中学2019-2020学年高一3月月考数学试题(已下线)第五篇 向量与几何 专题14 三角形射影定理 微点1 三角形射影定理(一)
13-14高三上·重庆·阶段练习
5 . 下列命题中,真命题的个数为( )
(1)在
中,若
,则
;
(2)已知
,
,则
在
上的投影
;
(3)已知
:
,
,
:
,
,则“
”为假命题;
(4)已知函数
(
)的导函数的最大值为3,则
的图
象关于
对称.
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a1711513b0b1e8599c99505d45558c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d31aea7bb335942f2c7da27a2f370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ed9c2e9fabbfc63733bae8fa079d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d11d6d0ff7e23315ab385370425696f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e20282b44b9a81a094e73325a1e0583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97842fd0ea2ea493566e5b4e363daa5e.png)
(4)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26355b576b4bd835bafbb52b99df6c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
象关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f56a20bc5fce6b02217627b42249854.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
9-10高三·重庆·阶段练习
6 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5971848ee811ba1ea3cb0d886a4f5bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eba2a1e617487f4eb192f5d649fdcd.png)
(
),且函数
的最小正周期为
.
⑴求函数
的解析式;
⑵在
中,角
所对的边分别为
,若
,
,且
,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5971848ee811ba1ea3cb0d886a4f5bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eba2a1e617487f4eb192f5d649fdcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a4264a120d024e23271001bf86ecb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
⑴求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
⑵在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33249e413f2e5d4ae3fb8fa382322d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d804fbb070992ee12076b3f6289d843e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be4380bdcef1c542604a6ad61642c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
您最近一年使用:0次