名校
1 . 已知
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6316d995f00623f05fc3d56a6cbe5f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97ee1b0f11eb3e98654b20b427208f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338189ec20d1ec7fdbbc189d209428dd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
2 . 如图,设
中角
所对的边分别为
为
边上的中线,已知
,且
,
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942404491608064/2944018805596160/STEM/6f070fe0-2e93-47f7-b722-3b9b285528e0.png?resizew=373)
(1)求
的值.
(2)设点
分别为边
上的动点,线段
交
于
,且
的面积为
面积的一半,求
的最小值.
![](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/97598771e2f206cd08b11e552121490b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33a89db6837f7865e9066a5a8eb0336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8b045bfec11194c0fe6b3e274893e3.png)
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942404491608064/2944018805596160/STEM/6f070fe0-2e93-47f7-b722-3b9b285528e0.png?resizew=373)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf899fa381162d5ddd95122c430dc6f.png)
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2022-03-25更新
|
214次组卷
|
2卷引用:湖北省荆州市石首市2021-2022学年高一下学期期中数学试题
名校
解题方法
3 . 如图,在
中,已知
为
边上的中点,点
在线段
上,且
;
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942404491608064/2944018805284864/STEM/a970ffe150984b3eb91a99fb26971bb4.png?resizew=331)
(1)求线段
的长度,
(2)设
与
相交于点
,求
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ad28741a054dd42e39c738045ee80f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35378828ca211fae49c9a4efc2d61678.png)
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942404491608064/2944018805284864/STEM/a970ffe150984b3eb91a99fb26971bb4.png?resizew=331)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
您最近一年使用:0次
2022-03-25更新
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653次组卷
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6卷引用:湖北省荆州市石首市2021-2022学年高一下学期期中数学试题
4 . 已知O为锐角三角形
的外心,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398b9f19ef587d655e4a2e8913496d79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92daabae2aada36f619b9ae78aefe3e6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-03-20更新
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549次组卷
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4卷引用:湖北省荆州市石首市2021-2022学年高一下学期期中数学试题
解题方法
5 . 以下四个命题中,正确的是( )
A.若![]() ![]() |
B.![]() |
C.![]() ![]() |
D.若![]() ![]() |
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2022-02-26更新
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627次组卷
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2卷引用:湖北省荆州市八县市2021-2022学年高二上学期期末质量检测数学试题
解题方法
6 . 已知△ABC中,
,
,点O是△ABC的外心,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f15da0cb7264fa30679596ea05a3c7f.png)
A.-![]() | B.-![]() | C.![]() | D.![]() |
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2022-02-21更新
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1358次组卷
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3卷引用:湖北省荆州市荆州区2022-2023学年高三上学期期末模拟数学试题
名校
解题方法
7 . 已知
为椭圆
上任一点,过
作圆
的两条切线
,
,切点分别为
,
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30a84472b64a6b502d3fa87ec8f4dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942220241f5cee4067da3b4acfa645e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308d43f6d98bb625ea4dfc833847a02c.png)
A.0 | B.![]() |
C.![]() | D.![]() |
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2022-02-16更新
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835次组卷
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3卷引用:湖北省圆创联考2022届高三下学期2月第二次联合测评数学试题
湖北省圆创联考2022届高三下学期2月第二次联合测评数学试题(已下线)思想01 函数与方程思想(讲)--第三篇 思想方法篇-《2022年高考数学二轮复习讲练测(浙江专用)》湖北省郧阳中学、恩施高中、随州二中、襄阳三中2022-2023学年高二下学期五月联考数学试题
名校
8 . 已知向量
,
,
,满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9cf46e8a1517a81557b90a09b04c68.png)
,
,
,
,则
与
的夹角为( )
![](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/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9cf46e8a1517a81557b90a09b04c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da5505e46c3f6601017cce84f51c2f4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3f8682540cd84c62e6fa835cd02f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4a5e3cb5a570878390165ff7c60fe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ffa6501b368966d3abee0f117e14730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
9 . 已知平面向量
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93d77f8cbba7e892cbfdf08b8d8045b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3254b4c5a3d9e44435c6ea05fc9d914e.png)
A.![]() | B.向量![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
10 . 已知O,N,P,I在
所在的平面内,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() | B.若![]() |
C.若![]() | D.若![]() |
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2021-12-03更新
|
2719次组卷
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6卷引用:湖北省荆州市公安县车胤中学2021-2022学年高一下学期3月月考数学试题
湖北省荆州市公安县车胤中学2021-2022学年高一下学期3月月考数学试题广东省广州市2020-2021学年高一下学期期末数学试题(已下线)9.2.3 向量的数量积 -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)黑龙江省哈尔滨师范大学附属中学2021-2022学年高一下学期4月份月考数学试题黑龙江省佳木斯市第一中学2022-2023学年高二上学期开学调研考试数学试题重庆市万州纯阳中学2022-2023学年高一下学期3月月考数学(A卷)试题