名校
解题方法
1 . 如图,在四棱锥
中,M为PD的中点,E为AM的中点,点F在线段PB上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/fd3f013b-1a62-4901-ae6a-89bd3bf62660.png?resizew=171)
(1)取DM中点G,设平面EFG与直线PC交于点H,再从以下两个条件中选择一个作为已知,求
;
条件①:
;条件②:
∥平面ABCD.
(2)若平面
底面ABCD,
,
,
,
,求平面PAD与平面PBC所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/fd3f013b-1a62-4901-ae6a-89bd3bf62660.png?resizew=171)
(1)取DM中点G,设平面EFG与直线PC交于点H,再从以下两个条件中选择一个作为已知,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685856a9b104bd06a26fa1954f2499e8.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afaa76e94414331574f42873e2b12c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795d1f8e68aee16240a4018dcbcb1e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64eb3310e5d1aaee7ca7a7889092798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
您最近一年使用:0次
2023-03-07更新
|
488次组卷
|
2卷引用:福建省华安县第一中学2024届高三上学期开学模拟数学试题
名校
解题方法
2 . 已知正四棱台
的所有顶点都在球
的球面上,
,
为
内部(含边界)的动点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ef56a20fafcf6cd3fcf82e251c52c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7941b1b4e6476e08e3259b22b3bca438.png)
A.![]() ![]() | B.球![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2022-09-22更新
|
2217次组卷
|
6卷引用:福建省泉州市2022-2023学年高三上学期期初数学试题