1 . 如图,在直三棱柱ABC-A1B1C1中.∠ BAC=90°,AB=AC=AA1 =1.D是棱CC1上的一点,P是AD的延长线与A1C1的延长线的交点,且PB1∥平面BDA.
(I)求证:CD=C1D:
(II)求二面角A-A1D-B的平面角的余弦值;
(Ⅲ)求点C到平面B1DP的距离.
(I)求证:CD=C1D:
(II)求二面角A-A1D-B的平面角的余弦值;
(Ⅲ)求点C到平面B1DP的距离.
![](https://img.xkw.com/dksih/QBM/2011/6/15/1570238676590592/1570238681956352/STEM/eb749ad7d68147aba6b00c1d6ab87276.png?resizew=261)
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2016-11-30更新
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5卷引用:2011年四川省普通高等学校招生统一考试理科数学
2011·四川成都·一模
名校
2 . 如图,已知菱形ABCD的边长为2,
,S为平面ABCD外一点,
为正三角形,
,M、N分别为SB、SC的中点.
![](https://img.xkw.com/dksih/QBM/2011/5/11/1570192032202752/1570192037199872/STEM/94acc631-c145-44c0-9dc2-7c930afc998a.png?resizew=300)
(1)求证:平面
平面ABCD;
(2)求二面角A—SB—C的余弦值;
(3)求四棱锥M—ABN的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b22e2a74105e80896c441d940d08540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e851cf27f94ac130d849e0b83af75528.png)
![](https://img.xkw.com/dksih/QBM/2011/5/11/1570192032202752/1570192037199872/STEM/94acc631-c145-44c0-9dc2-7c930afc998a.png?resizew=300)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877582b5387278008d14fe5932622fe7.png)
(2)求二面角A—SB—C的余弦值;
(3)求四棱锥M—ABN的体积.
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10-11高二下·四川成都·阶段练习
3 . 如图,四棱锥P﹣ABCD的底面是边长为
的菱形,∠BCD=120°,PC⊥平面ABCD,PC=
,E为PA的中点,O为底面对角线的交点;
![](https://img.xkw.com/dksih/QBM/2011/4/2/1570103484932096/1570103490142208/STEM/ac6544d6196141cf81de7fe54081fe69.png?resizew=215)
(1)求证:平面EDB⊥平面ABCD;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2011/4/2/1570103484932096/1570103490142208/STEM/ac6544d6196141cf81de7fe54081fe69.png?resizew=215)
(1)求证:平面EDB⊥平面ABCD;
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af818319be607187e4c0ee637e9e024a.png)
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4 . 在直三棱柱ABC﹣A1B1C1中,AA1=1,AB=2,AC=1,∠BAC=60°,D为BC的中点.
![](https://img.xkw.com/dksih/QBM/2011/3/25/1570064628301824/1570064633683968/STEM/8c16c7f3-1818-49cd-af18-fb91214ea5ea.png?resizew=247)
(I)求证:平面ACC1A1⊥平面BCC1B;
(II)求直线DA1与平面BCC1B1所成角的大小;
(III)求二面角A﹣DC1﹣C的大小.
![](https://img.xkw.com/dksih/QBM/2011/3/25/1570064628301824/1570064633683968/STEM/8c16c7f3-1818-49cd-af18-fb91214ea5ea.png?resizew=247)
(I)求证:平面ACC1A1⊥平面BCC1B;
(II)求直线DA1与平面BCC1B1所成角的大小;
(III)求二面角A﹣DC1﹣C的大小.
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9-10高二下·四川眉山·期末
5 . 如图所示,平面
平面
,
是等边三角形,四边形
是矩形,F是AB的中点,G是AD的中点,EC与平面
成
角.
![](https://img.xkw.com/dksih/QBM/2010/7/7/1569782356746240/1569782362054656/STEM/ff3ffcbff94d42f099833e35bdea6214.png?resizew=338)
(1)求证:
平面
;
(2)若
,求二面角
的度数;
(3)当AD的长是多少时,D点到平面
的距离为2?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abb27f8d654064a92f9d7a11e586ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2010/7/7/1569782356746240/1569782362054656/STEM/ff3ffcbff94d42f099833e35bdea6214.png?resizew=338)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0df73a49d4348a5c1e3aaa149cc8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0b10e8c3309c0a6f1e3bb7656afd45.png)
(3)当AD的长是多少时,D点到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a681d311a864d38cf306a0c137cbcca.png)
您最近一年使用:0次
真题
6 . 如图,平面
平面
,四边形
与
都是直角梯形,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d254eb97bed6c88489d5f99166bec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0489afea1bda99045a019d1f427128.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0489afea1bda99045a019d1f427128.png)
.
(Ⅰ)证明:
四点共面;
(Ⅱ)设
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d254eb97bed6c88489d5f99166bec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0489afea1bda99045a019d1f427128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cb1a4c5afb590c7c17de14d15651e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0489afea1bda99045a019d1f427128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe04847f0b112bf970aebcc12d84ef9.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d6e29d79a1bd34722833d4c059644f.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133ac212fbb42063ccf66f61c35d4ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79f1787b7a6c0999d4a415616c0b75c3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/ef0e0566-039d-48e9-bb74-3e3ed1975699.png?resizew=168)
您最近一年使用:0次
2016-11-30更新
|
970次组卷
|
2卷引用:2008年普通高等学校招生全国统一考试理科数学(四川卷)
2011·四川南充·二模
7 . 已知
是表面积为
的球面上三点,且
,
,
,
为球心,则二面角
的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e42562b8980589bb90419100043500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b96fac11d72f72c805dbddb8da72d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef94adbee8d7ad478d0105a988e66e5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 已知球O的半径是1,A、B、C三点都在球面上,A、B两点和A、C两点间的球面距离都是
,B、C两点间的球面距离是
,则二面角
的大小是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a6f049208a8ff3350c105a41c35874.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2010-07-10更新
|
1291次组卷
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3卷引用:四川省眉山市高中09-10学年高二下学期期末质量测试数学试题(文科)
(已下线)四川省眉山市高中09-10学年高二下学期期末质量测试数学试题(文科)2006 年普通高等学校招生考试数学(理)试题(四川卷)江苏省苏州市常熟中学2019-2020学年高二下学期六月质量检测数学试题