名校
解题方法
1 . 如图1,在
中,
,
,
,P是
边的中点,现把
沿
折成如图2所示的三棱锥
,使得
.
(1)求证:平面
⊥平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58899f5c3638f1e32274137723f99836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7d022859b8853d7be8f2bf6487a693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bc235df1d3cf1b65050cd1907590cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/ce927b30-08e5-4aec-8edc-f8647887b1a8.png?resizew=278)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df5935c893580c77ab6fa6eb0a70bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b489c25405ce48699d4f0a62820bed.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e67a35615a7a9b3aeb0212a62cef30.png)
您最近一年使用:0次
2023-09-03更新
|
773次组卷
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7卷引用:江苏省泰州中学2023-2024学年高三上学期期初调研数学试题
名校
解题方法
2 . 如图,已知在四棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
平面
,四边形
为直角梯形,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/2/3/2649941266481152/2651071974719488/STEM/13eb600a-c06b-466f-9996-ba23b08ece0c.png)
(1)求直线
与平面
所成角的正弦值;
(2)在线段
上是否存在点
,使得二面角
的余弦值
?若存在,指出点
的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.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/04a93f5289c1483bc39b0125fdc8dd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://img.xkw.com/dksih/QBM/2021/2/3/2649941266481152/2651071974719488/STEM/13eb600a-c06b-466f-9996-ba23b08ece0c.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3af94daf0394610273f06189ac1348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
2021-02-04更新
|
636次组卷
|
3卷引用:江苏省泰州市第二中学2020-2021学年高二下学期期初检测数学试题
名校
解题方法
3 . 已知直三棱柱
中,
,
,点
、
分别为
、
的中点,则直线
和
所成角的余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8f940b796af67206b3f9dd410a407.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/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次
2021-02-04更新
|
326次组卷
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2卷引用:江苏省泰州市第二中学2020-2021学年高二下学期期初检测数学试题
名校
4 . 如图,在直三棱柱
中,
,
,M是棱BC的中点,点P在线段A1B上.
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640284804767744/2641067202428928/STEM/6f4b4802-a53c-43ee-8d69-ec1b24251c7f.png)
(1)若P是线段
的中点,求直线MP与平面
所成角的大小;
(2)若N是
的中点,平面PMN与平面CMN所成锐二面角的余弦值为
,求线段BP的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002c709e9fee8d477bddfe595cc760f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640284804767744/2641067202428928/STEM/6f4b4802-a53c-43ee-8d69-ec1b24251c7f.png)
(1)若P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若N是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad62b8bb4df5dc2999d9b2a139c7d3ff.png)
您最近一年使用:0次
2021-01-21更新
|
410次组卷
|
2卷引用:江苏省泰州中学2020-2021学年高二下学期期初检测数学试题
名校
解题方法
5 . 如图所示,PA⊥平面ADE,B,C分别是AE,DE的中点,AE⊥AD,AD=AE=AP=2.
![](https://img.xkw.com/dksih/QBM/2021/1/10/2633356702089216/2633734749683712/STEM/69cbc8273bfe42e3b13cc4a57d7ffab3.png?resizew=190)
①求二面角A-PE-D的余弦值;
②点Q是线段BP上的动点,当直线CQ与DP所成的角最小时,求线段BQ的长.
![](https://img.xkw.com/dksih/QBM/2021/1/10/2633356702089216/2633734749683712/STEM/69cbc8273bfe42e3b13cc4a57d7ffab3.png?resizew=190)
①求二面角A-PE-D的余弦值;
②点Q是线段BP上的动点,当直线CQ与DP所成的角最小时,求线段BQ的长.
您最近一年使用:0次
2021-01-11更新
|
353次组卷
|
8卷引用:江苏省泰州中学2019-2020学年高二下学期期初检测数学试题
江苏省泰州中学2019-2020学年高二下学期期初检测数学试题四川省成都市第七中学2018届高三上学期入学考试数学(理)试题2016届湖北武汉华中师大一附高三5月月考理科数学试卷(已下线)专题8.8 翻折与探索性问题(精讲)-2021年高考数学(理)一轮复习讲练测(已下线)专题8.8 翻折与探索性问题(精讲)-2021年高考数学(理)一轮复习学与练(已下线)【新东方】在线数学160高二上四川省遂宁中学校2020-2021学年高二下学期第一次月考数学(理)试题(已下线)专题8.7 立体几何中的向量方法(讲)【理】-《2020年高考一轮复习讲练测》
名校
解题方法
6 . 如图,
平面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/fbbd44be-35c3-4f37-8595-0d2e03f799cc.png?resizew=163)
(1)直线
与平面
所成角的正弦值;
(2)若二面角
的余弦值为
,求线段
的长.
![](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/f555fb7ea6e77a6e0fe38586a3992d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88dac2c17c765517c2163ab43bbe1038.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/fbbd44be-35c3-4f37-8595-0d2e03f799cc.png?resizew=163)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147310251a463539f66374c1f452fb67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次
2019-09-11更新
|
875次组卷
|
7卷引用:2019年江苏省泰州市泰州中学高三上学期开学考试数学(理)试题
11-12高三·宁夏银川·阶段练习
名校
7 . 如图,四棱锥
的底面为矩形,
是四棱锥的高,
与
所成角为
,
是
的中点,
是
上的动点.
![](https://img.xkw.com/dksih/QBM/2016/12/29/1619414123896832/1619414124322816/STEM/095ead0c-61e0-4e5d-bd43-51f97ea6a349.png?resizew=226)
(1)证明:
;
(2)若
,求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2016/12/29/1619414123896832/1619414124322816/STEM/095ead0c-61e0-4e5d-bd43-51f97ea6a349.png?resizew=226)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a395778dcf588264f40e1cd8c96206d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c310aa0cddf8c787c3d21b737475a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
您最近一年使用:0次
2017-02-08更新
|
1756次组卷
|
4卷引用:2016届江苏省泰州市姜堰区高三下期初考试数学试卷