名校
解题方法
1 . 如图,二面角
的大小为
,
,
分别在平面
,
内,
,
,
,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/df2cc5cb-0485-4a0d-8f62-01e3bd32213b.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ce3f859c6b9a0cfc98bdf5b3d0f395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](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/a3ededa0e19291b5b7eb9884af5bdeb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cec3803e3e4da37bd4ec4ebdc3cfa94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bab9b67eabe74756b8cd7344515135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b56ed991a28fe7c6efac4dbca46b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee28f91a63a0af514725b2792927494e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3d627f5fbd04271389d503942d233.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/df2cc5cb-0485-4a0d-8f62-01e3bd32213b.png?resizew=167)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-11-04更新
|
1898次组卷
|
8卷引用:安徽省六安市第一中学2020-2021学年高二下学期开学考试数学(理)试题
安徽省六安市第一中学2020-2021学年高二下学期开学考试数学(理)试题湖北省武汉市育才中学2019-2020学年高二上学期第二次段考理科数学试题(已下线)专题04 空间向量与立体几何的压轴题(二)-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)浙江省台州市书生中学2021-2022学年高二上学期10月月考数学试题河南省焦作市温县第一高级中学2021-2022学年高二上学期10月月考数学(文)试题浙江省杭州学军中学紫金港校区2021-2022学年高二上学期期中数学试题浙江省台州市玉环市玉城中学2022-2023学年高二上学期第一次月考数学试题山东省泰安新泰市第一中学(弘文部)2023-2024学年高二上学期第一次大单元自主测试数学试题
名校
解题方法
2 . 在
中,
,G为
的重心,H为
的垂心.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322ce6e10e7f7ca1a796f3c93763d76d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ed91307d4836bb4323a3ed1973faf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322ce6e10e7f7ca1a796f3c93763d76d.png)
A.4 | B.5 | C.-4 | D.-5 |
您最近一年使用:0次
名校
3 . 在平面上,
,
,
,若
,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7eb6925e75de0b7b7cb45d5f8da98b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e29c718b27c6427c957fa82b1ee89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1032f8e849a4933a4426afc57b4dcd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0662e509823e1cee4598caec4c677a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10769b19729996c947add3ac158ca0e5.png)
您最近一年使用:0次
2019-12-11更新
|
753次组卷
|
3卷引用:安徽省芜湖市第一中学2021-2022学年高一下学期3月月末诊断测试数学试题
4 . 设H是△ABC的垂心,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94091d69879156a80e8816f06978923c.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e82aba554f42dd062cac247b9a7fd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94091d69879156a80e8816f06978923c.png)
您最近一年使用:0次
2019-01-28更新
|
659次组卷
|
3卷引用:2018年全国高中数学联赛安徽省预赛
2018年全国高中数学联赛安徽省预赛江苏省南京市金陵中学、南通市海安高级中学、南京市外国语学校2020届高三下学期第四次模拟数学试题(已下线)专题07 奔驰定理与四心的相关运算及构造圆解决向量问题-【重难点突破】2021-2022学年高一数学常考题专练(人教A版2019必修第二册)
5 . 设平面向量
、
满足
.则
的取值范围是______ .
![](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/f98a7d5131ad189ea74159fd3c151bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df279462385777530f5e5d5883c370d9.png)
您最近一年使用:0次
6 . 已知
,
,且
,点
满足
,
,
.则
是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8530bca5123179cfede86d03738495e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0060a368e8f3463fb22f9d354b64a98f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4384a98359e3d776f5106ba469ead6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b043ff1ab9ca49afde3600adc76a09ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de668d28c822e99c2b57ec9491f23356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2778e32967f15edf5cb7b834e4e0f7d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288670c577f802d8f4b61817875ee87d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33588496ba4046b55abaeaf4794a23d3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
7 . 已知
,
,
和
之间有关系式
,其中
.则
的最小值为__________________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96557e5605dd2816d255ac34a754261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db53fa918e0ecbf6883d4727ea6bdedc.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/446fab353732020680a0d7e0bfc0a921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d07b858e930f9fc05927e4f6fa4105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a560b8ff794c12dc8d194bcd2e3f3554.png)
您最近一年使用:0次
8 . 已知
.设X是直线OP上的一点(O为坐标原点).那么,使
取最小值时,∠AXB的值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa374aa513c0646fa5bc6dd13d392c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482b1f40a38ea18b22941485263baf0e.png)
A.90° | B.![]() |
C.![]() | D.![]() |
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