1 . 如图,三棱柱
中,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/af0ccb72-6df0-4734-8ab7-a2a9e7dfb4de.png?resizew=203)
(1)求证:平面
平面
;
(2)若
与平面
所成的线面角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0bd8d40e2421c9cf77eb1e72c767b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/af0ccb72-6df0-4734-8ab7-a2a9e7dfb4de.png?resizew=203)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3b56a19d400eb5ce0b5a8744c27d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf00c8ce4f168f98858b3518d7a2b1d.png)
您最近一年使用:0次
2019-06-18更新
|
1234次组卷
|
4卷引用:2020届山西省大同市高三模拟(3月)数学(理)试题
2020届山西省大同市高三模拟(3月)数学(理)试题【校级联考】河南省八市重点高中联盟“领军考试”2019届高三第五次测评数学(理)试题(已下线)卷05-2020年高考数学冲刺逆袭必备卷(山东、海南专用)【学科网名师堂】江西省赣州市会昌县第五中学2020-2021学年高二下学期数学(理)开学考试试题
名校
2 . 在如图所示几何体中,四边形ABCD与ABEF均为直角梯形,
,
,
,
,且平面
平面
.已知
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/22/2941844135526400/2942672629096448/STEM/51158afb-9e2e-4d85-9b35-03457f104978.png?resizew=189)
(1)证明:
;
(2)求直线EF与平面BEC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d61d846cbc5220533271c962b85c4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eed15d0ed75bf936f224f931da5d950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bebae04c72b934bfbbf0b4d01f164f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c8bf5571150ab2974b6471d9b837a7.png)
![](https://img.xkw.com/dksih/QBM/2022/3/22/2941844135526400/2942672629096448/STEM/51158afb-9e2e-4d85-9b35-03457f104978.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f6382a8285b7e7bfe642b7158e55df.png)
(2)求直线EF与平面BEC所成角的正弦值.
您最近一年使用:0次
2022-03-23更新
|
336次组卷
|
2卷引用:山西省大同市灵丘县第一中学等名校2021-2022学年高二下学期3月联考数学试题
20-21高三下·辽宁·阶段练习
3 . 如图,圆
的半径为
,
、
是圆
的两条互相垂直的直径,
为
的中点,
.将此图形沿着
折起,在翻折过程中,点
对应的点为
.
![](https://img.xkw.com/dksih/QBM/2021/3/7/2672963776921600/2672992952459264/STEM/467517dc-036d-4ce6-995a-3287e910a07f.png?resizew=518)
(1)证明:
;
(2)当
时,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd8a97f37156cec6592795da3941f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://img.xkw.com/dksih/QBM/2021/3/7/2672963776921600/2672992952459264/STEM/467517dc-036d-4ce6-995a-3287e910a07f.png?resizew=518)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d2c127e203a0cf07921d8386902c6b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a90d6f16f1bfa7a67ba5987f249ce6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849e9b7d8884ce1dc513e882bc98fd61.png)
您最近一年使用:0次
名校
4 . 在长方体
中,底面
是边长为2的正方形,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/3bac2b27-9a61-44b5-a336-9e524061e193.png?resizew=170)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
.
(2)求
与平面
所成角的正弦值.
![](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/2501c41a2761d3e8371a3383fba33fda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc0454f72e6dba8d432c76491aedcce9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/3bac2b27-9a61-44b5-a336-9e524061e193.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
您最近一年使用:0次
2022-11-10更新
|
302次组卷
|
6卷引用:山西省大同市第三中学校2022-2023学年高二上学期期中数学试题
名校
5 . 如图,在直三棱柱ABC-A1B1C1中,AC⊥BC,AC=BC=1,AA1=2. M为侧棱BB1的中点,连接A1M,C1M,CM.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/f9338469-09da-4f36-9943-e79213213b75.png?resizew=138)
(1)证明:AC//平面A1C1M;
(2)证明:CM⊥平面A1C1M;
(3)求二面角C1-A1M-B1的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/f9338469-09da-4f36-9943-e79213213b75.png?resizew=138)
(1)证明:AC//平面A1C1M;
(2)证明:CM⊥平面A1C1M;
(3)求二面角C1-A1M-B1的大小.
您最近一年使用:0次
2022-01-14更新
|
323次组卷
|
7卷引用:山西省大同市云冈区汇林中学2023-2024学年高二上学期期中数学试题
名校
解题方法
6 . 如图,正三棱柱
的底面边长为2,侧棱长为2,则
与
所成的角的余弦值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cf3bff56a7f4ab6c0008e90823025d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/cb4ce48f-08fc-4d8f-b74e-38d54299bb5b.png?resizew=180)
您最近一年使用:0次
2022-10-26更新
|
298次组卷
|
2卷引用:山西省阳高一中2022-2023学年高二上学期十一月线上检测数学试题
解题方法
7 . 在如图所示的四棱锥
中,四边形
是等腰梯形,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a24af61c-7ae8-4188-997d-dce7734cc9ac.png?resizew=151)
(1)求二面角
的余弦值.
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5ba482836565abad208665cf7b9972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b5a90e556da12d63b7f481bd8e874c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111e8adcc9c7840748f246a8823d6e25.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a24af61c-7ae8-4188-997d-dce7734cc9ac.png?resizew=151)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9d40f58f5fd5fb401a529a42b93ff1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138a5261a4cd0cb1f14b1dfccd4d916d.png)
您最近一年使用:0次
名校
8 . 如图,在四棱锥
中,四边形
是直角梯形,
,
底面
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/85304253-730a-484b-add9-c15d7c33576a.png?resizew=202)
(1)求证:
;
(2)若三棱锥
的体积为
,求二面角
的正弦值.
![](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/af2ed27ad118ce1479d0168f82b0ce76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df83fecdc7dab4e0f1c53dc0b125703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/85304253-730a-484b-add9-c15d7c33576a.png?resizew=202)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4070b9c49f0aa8358d117f88ae768bef.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade68d3f913ba0357f38a808392f5820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
您最近一年使用:0次
2020-11-15更新
|
639次组卷
|
4卷引用:山西省大同市大同一中2021届高三上学期期中质量检测理科数学试题
名校
9 . 如图,在四棱锥P-ABCD中,底面ABCD为矩形,
平面ABCD,PA=AD=2,AB=1,E为棱PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/c18f5be0-438c-47ce-a6d0-24d8aabc26cb.png?resizew=178)
(1)求证:
平面PCD;
(2)求平面AEC与平面PAC的夹角余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/c18f5be0-438c-47ce-a6d0-24d8aabc26cb.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
(2)求平面AEC与平面PAC的夹角余弦值.
您最近一年使用:0次
2022-01-17更新
|
234次组卷
|
2卷引用:山西省大同市2021-2022学年高二上学期期末数学(理)试题
名校
10 . 如图,在三棱柱
中,
底面
,D为
的中点,点P为棱
上的动点(不包括端点),
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825589920301056/2832545602781184/STEM/677237cd548b4f2a9bcf105dae5516fa.png?resizew=166)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae8a050d7159d4296c2409e5bc0bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825589920301056/2832545602781184/STEM/677237cd548b4f2a9bcf105dae5516fa.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2021-10-19更新
|
368次组卷
|
3卷引用:山西省大同市新世纪中学2021-2022学年高二上学期第一次月考数学试题
山西省大同市新世纪中学2021-2022学年高二上学期第一次月考数学试题吉林省四平市第一高级中学2021-2022学年高二上学期10月月考数学试题(已下线)河南省南阳市2022-2023学年高三上学期期末数学(理)试题变式题16-20