名校
解题方法
1 . 如图,在四棱柱
中,底面
为菱形,其对角线
与
相交于点O,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/e70aa230-2bd0-4aea-9605-7ff447b54f3b.png?resizew=268)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正切值;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/e70aa230-2bd0-4aea-9605-7ff447b54f3b.png?resizew=268)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c6ee40dff32baf8ffbf3cd4562c25a.png)
您最近一年使用:0次
2 . 如图,四棱锥
中,底面
为正方形,
平面
,
、
分别是棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/427c4401-61fb-40b3-a654-ac1742db4757.png?resizew=149)
(1)求证:
平面
;
(2)求证:
.
(3)已知正方形
的边长为2,
,求:
①异面直线
所成角的余弦;
②直线
与平面
所成角的正弦.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/427c4401-61fb-40b3-a654-ac1742db4757.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c672f693a7e75a7bae4936dcb1920430.png)
(3)已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
①异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2682f3f3f0f72c893b99073bcac83ff2.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
名校
3 . 如图,在四棱锥
中,
平面
,
,
.
;
(2)求二面角
的余弦值;
(3)设E为棱
上的点,满足异面直线
与
所成的角为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a6f24d572cfcf71f6bfc865dfb130c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04551ba34c64817c241d7b5003b46d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352d85caf2bd9c6c66709d09df0ee0ac.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
(3)设E为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
2022-07-06更新
|
997次组卷
|
3卷引用:天津市第三中学2021-2022学年高一下学期期末数学试题
名校
4 . 如图,在正三棱柱
中,已知
,且D为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/b71b663b-b23c-4370-bee1-f1c973ece16d.png?resizew=233)
(1)求证:
平面
;
(2)求
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ececd428cc1a2afe8ee8a6b14b726cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/b71b663b-b23c-4370-bee1-f1c973ece16d.png?resizew=233)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebe6a446b91e73b181f9f4d56264dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2022-07-01更新
|
1521次组卷
|
3卷引用:天津市第一中学2022-2023学年高一下学期期末数学试题
名校
5 . 如图,正方体
的棱长为1,线段
上有两个不同的动点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/10bf0881-c35e-4fa0-971a-7799059f02ab.png?resizew=269)
(1)求证:
平面
;
(2)求证:
;
(3)二面角
的大小是否为定值,若是,求出其余弦值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/10bf0881-c35e-4fa0-971a-7799059f02ab.png?resizew=269)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ddae20626f9aaac616d2a3b5d95bd.png)
(3)二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770d42343599d3f26f0e0de8d5849f52.png)
您最近一年使用:0次
2022-06-13更新
|
1476次组卷
|
2卷引用:天津市南开中学2021-2022学年高一下学期期末数学试题
名校
6 . 如图,
平面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/881fafeb-0627-4531-b84f-6b889496ce4a.png?resizew=198)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值;
(3)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883200c4d4e82a5411064a644aabfe33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ca2e3660659b7ecbb96f80c0539f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88dac2c17c765517c2163ab43bbe1038.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/881fafeb-0627-4531-b84f-6b889496ce4a.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d888c0b616792a2c41ff180de99fbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2022-06-01更新
|
1199次组卷
|
8卷引用:天津市第二十五中学2022-2023学年高三上学期期末数学试题
天津市第二十五中学2022-2023学年高三上学期期末数学试题天津市武清区杨村第一中学2022届高三下学期高考第一次热身练数学试题天津市南开中学2023届高三上学期统练2数学试题天津市南仓中学2022-2023学年高三上学期第一次教学质量过程性监测与诊断数学试题天津市第二南开学校2022-2023学年高三下学期开学学情调查数学试题天津外国语大学附属外国语学校2023届高三上学期10月月考数学试题(已下线)2022年高考天津数学高考真题变式题7-9题(已下线)2022年高考天津数学高考真题变式题16-18题
名校
解题方法
7 . 如图,在棱长为1的正方体
中,
是棱
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806767505408/2991275603574784/STEM/21797cb2-0fed-4e0f-9137-9a0801097d28.png?resizew=168)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
(2)求直线
和平面
所成的角的正弦值.
(3)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806767505408/2991275603574784/STEM/21797cb2-0fed-4e0f-9137-9a0801097d28.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d365ce9f4bacc4d4bb15dbdb5306a5.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d365ce9f4bacc4d4bb15dbdb5306a5.png)
您最近一年使用:0次
2022-05-31更新
|
970次组卷
|
7卷引用:天津市滨海新区塘沽第一中学2022-2023学年高二上学期期末数学试题
名校
8 . 如图所示,在几何体ABCDEF中,四边形ABCD为直角梯形,AD∥BC,AB⊥AD,AE⊥底面ABCD,AE∥CF,AD=3,AB=BC=AE=2,CF=1.
![](https://img.xkw.com/dksih/QBM/2022/5/30/2990327739441152/2990678540328960/STEM/81d86ab2-3111-46cf-b338-e0a73cc0d9bb.png?resizew=208)
(1)求证:BF∥平面ADE;
(2)求直线BE与直线DF所成角的余弦值;
(3)求点D到直线BF的距离.
![](https://img.xkw.com/dksih/QBM/2022/5/30/2990327739441152/2990678540328960/STEM/81d86ab2-3111-46cf-b338-e0a73cc0d9bb.png?resizew=208)
(1)求证:BF∥平面ADE;
(2)求直线BE与直线DF所成角的余弦值;
(3)求点D到直线BF的距离.
您最近一年使用:0次
2022-05-30更新
|
1691次组卷
|
6卷引用:天津市第十四中学2022-2023学年高三上学期期末数学试题
名校
9 . 如图,在四棱锥
中,平面
平面
,
,
,
,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989015331520512/2989796040163328/STEM/290164d2-542c-4a5a-af3b-778e906cfdaf.png?resizew=167)
(1)求证:
平面
;
(2)求平面
与平面
夹角的正弦值;
(3)
为线段
的中点,求直线
与平面
所成的角正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30f6595dd643813b11ad71df61a10dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0295d3385f3ec11ad4d77d39d2e68ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bed3e10975653a8322f9b3e6abc1df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989015331520512/2989796040163328/STEM/290164d2-542c-4a5a-af3b-778e906cfdaf.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa14afe6f0aad22e8e869c39a60be657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
您最近一年使用:0次
2022-05-29更新
|
932次组卷
|
2卷引用:天津大学附属中学2022-2023学年高三上学期期末数学试题
名校
解题方法
10 . 如图,在四棱锥P—ABCD中,
平面ABCD,底面ABCD是直角梯形,其中AD∥BC,
,E为棱BC上的点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6d9a407beaf65ad3f311971eeba30.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987202054963200/2987907091619840/STEM/52ce0c21-c483-43bb-9c04-ca4251733964.png?resizew=196)
(1)求证:DE⊥平面
;
(2)求二面角
的余弦值;
(3)设Q为棱CP上的点(不与C、P重合),且直线QE与平面PAC所成角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6bfc40d98a735f6f717bcced546dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6d9a407beaf65ad3f311971eeba30.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987202054963200/2987907091619840/STEM/52ce0c21-c483-43bb-9c04-ca4251733964.png?resizew=196)
(1)求证:DE⊥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07edbbae5955968df5486d73e1bf7fc3.png)
(3)设Q为棱CP上的点(不与C、P重合),且直线QE与平面PAC所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf8af35735950780f8c72f1268bcf52.png)
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2022-05-26更新
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15卷引用:天津市宝坻区大口屯高中2021-2022学年高三上学期结课考试数学试题
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