名校
1 . 如图,圆心为C的定圆的半径为3,A,B为圆C上的两点.
(1)若
,当k为何值时,
与
垂直?
(2)若
的最小值为2,求
的值;
(3)若G为
的重心,直线l过点G交边
于点P,交边
于点Q,且
,
.证明:
为定值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/9785ae46-35c8-4c6f-8312-728689c016ae.png?resizew=154)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d33d7bbd89950f7ba1bf5a855b0ab9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1144b19a3d032433b77c8e07dca969a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b683b0c4ccd5747b8c41d4ed30d1e088.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7464972070329b8372b7c77885f77a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d401876b078e318413b8ad876c54b7be.png)
(3)若G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73ba7fd5c3f0fbfb7325dbc1e1c1879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6f8a5f095834d20f66ffbd1cdd40bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587b693b82241eb9c32cdbb96c209f33.png)
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2023-07-06更新
|
631次组卷
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2卷引用:重庆市渝中区等4区2022-2023学年高一下学期期末数学试题
解题方法
2 . 下列说法正确的是( )
A.平行向量不是共线向量 |
B.若两个非零向量![]() ![]() |
C.向量![]() ![]() ![]() ![]() |
D.向量![]() ![]() ![]() |
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名校
解题方法
3 . 已知在△ABC中,角A,B,C的对边分别为a,b,c,___________.
①
;②
;③
.
请在以上三个条件中任选一个补充在横线处,并解答:
(1)求角C的值;
(2)若
且
,求
的值.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b041299d8a297daa0dc50b352c36659f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2a13acc4afb92747de8b7eb30f97a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76fd59dece697a73f6f3acead26f1e8.png)
请在以上三个条件中任选一个补充在横线处,并解答:
(1)求角C的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793489747c26a86a01ae9038457a91d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3f6ff5409adb4c6464b9c4378e33b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe89d0ce747d21036a5ba5415a88d78.png)
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2022-07-16更新
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1348次组卷
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7卷引用:重庆市西南大学附属中学2021-2022学年高一下学期期末数学试题
重庆市西南大学附属中学2021-2022学年高一下学期期末数学试题重庆市九龙坡区育才中学2023-2024学年高一下学期寒假检测定时训练数学试题湖北省部分重点中学2022-2023学年高二上学期9月联考数学试题湖北省武汉市第十一中学2022-2023学年高二上学期10月月考数学试题(已下线)第12讲 解三角形与平面向量结合问题(已下线)模块四 专题5 期末重组综合练(重庆)黑龙江省哈尔滨市第一中学校2023-2024学年高一下学期第一次质量检测数学试卷
解题方法
4 . 如图,边长为2的等边
所在平面内一点
满足
(
),点
在边
上,
.
的面积为
,记
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/b426e10e-70dc-45e8-b117-b68e7c612f9a.png?resizew=162)
(1)用
,
及
表示
;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614025c60bc886a01f105c56ccd7820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649b1edb8f00f54ba382ea791de6a6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bb4ef08f6070a6bbc54ea9c4f130d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2abc6def96a69506a76f69c92931f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7414e133e77ee1c45aa017c7be4cce3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/b426e10e-70dc-45e8-b117-b68e7c612f9a.png?resizew=162)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49163e9dc6878910a10d2b4aa1ddad93.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90329db989dee62273854778ed145eb.png)
您最近一年使用:0次
2022-07-07更新
|
926次组卷
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2卷引用:重庆市2021-2022学年高一下学期期末数学试题
解题方法
5 . 在
年
月
日举行的北京冬奥会开幕式上,贯穿全场的雪花元素为观众带来了一场视觉盛宴,象征各国、各地区代表团的
朵“小雪花”汇聚成一朵代表全人类“一起走向未来”的“大雪花”的意境惊艳了全世界(如图①),顺次连接图中各顶点可近似得到正六边形
(如图②).已知正六边形的边长为
,点
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9762eba04f6130384fee12f31bf0d5c.png)
______ ;若点
是其内部一点(包含边界),则
的最大值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01dd350dc95f42f1883e0cc7aae084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d314c287aa376240f0ca41bd181f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb943feaba6a635b4d4fb393f8de0cb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9762eba04f6130384fee12f31bf0d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a9c27ea53c6748e4a788b7400f25a4.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964980448542720/2967014655361024/STEM/95b12187-f17a-4c32-8ea0-cf9a3e203730.png?resizew=280)
您最近一年使用:0次
2022-04-27更新
|
498次组卷
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3卷引用:重庆市巫山县官渡中学2021-2022学年高一下学期期末数学试题
6 . 在
中,
,
,
分别为角
,
,
所对的边,从以下条件中任选一个回答下列问题(若多选则以选择的第一个为准).
①
;
②向量
与向量
垂直;
③
;
(1)求角
;
(2)若
,点
满足
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a967267c2d5858fd2de548d315bb2a6b.png)
②向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31abe5426f2d9895ed689f31801989d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ffd296a50a3cebe1102014d369c281.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24955421f80daff3e3d374407bf92aa5.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05d3b8f5c9df891ef6fbcaf12f43207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3ae3ea9d8354844aded187f4726543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba1883c53ebf30a9e53e9b7f3bce4ba.png)
您最近一年使用:0次