名校
解题方法
1 . 如图1,矩形ABCD中,
,
,E为CD的中点,现将
,
分别沿AE,BE向上翻折,使点D,C分别到达点M,N的位置,且平面AME,平面BNE均与平面ABE垂直(如图2).
(2)求直线AE与平面ABNM所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(2)求直线AE与平面ABNM所成角的正弦值.
您最近一年使用:0次
2023-06-17更新
|
344次组卷
|
5卷引用:山东省青岛市2023届高三下学期第二次适应性检测数学试题
名校
解题方法
2 . 如图,在四棱锥
中,
平面
,
,
,
,
.
(1)证明:
;
(2)若
为线段
的靠近
点的四等分点,判断直线
与平面
是否相交?如果相交,求出
到交点
的距离,如果不相交,说明理由.
![](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/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81981fd7b343f4fe2db8f36eb66c1ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/2/da83d537-7ca8-4542-b688-3ad842ebe585.png?resizew=138)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
您最近一年使用:0次
2023-05-30更新
|
918次组卷
|
3卷引用:山东省实验中学2023届高三第二次模拟考试数学试题
解题方法
3 . 已知正方体
中,点E,F分别是棱
,
的中点,过点
作出正方体
的截面,使得该截面平行于平面
.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958773704974336/2962432117063680/STEM/aca233f8b2b4405bb2fa66ba10396e70.png?resizew=156)
(1)作出该截面与正方体表面的交线,并说明理由;
(2)求
与该截面所在平面所成角的正弦值.
(截面:用一个平面去截一个几何体,平面与几何体的表面的交线围成的平面图形.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958773704974336/2962432117063680/STEM/aca233f8b2b4405bb2fa66ba10396e70.png?resizew=156)
(1)作出该截面与正方体表面的交线,并说明理由;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
(截面:用一个平面去截一个几何体,平面与几何体的表面的交线围成的平面图形.)
您最近一年使用:0次
解题方法
4 . 如图,在三棱台ABC−A1B1C1中,△ABC为等边三角形,AA1⊥平面ABC,将梯形AA1C1C绕AA1旋转至AA1D1D位置,二面角D1−AA1−C1的大小为30°.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948553529303040/2953968848871424/STEM/86c7c9f930aa4dedbfac768e1a3e54e9.png?resizew=234)
(1)证明:A1,B1,C1,D1四点共面,且A1D1⊥平面ABB1A1;
(2)若AA1=A1C1=2AB=4,设G为DD1的中点,求直线BB1与平面AB1G所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948553529303040/2953968848871424/STEM/86c7c9f930aa4dedbfac768e1a3e54e9.png?resizew=234)
(1)证明:A1,B1,C1,D1四点共面,且A1D1⊥平面ABB1A1;
(2)若AA1=A1C1=2AB=4,设G为DD1的中点,求直线BB1与平面AB1G所成角的正弦值.
您最近一年使用:0次
名校
5 . 图1是由矩形
、等边
和平行四边形
组成的一个平面图形,其中
,
,N为
的中点.将其沿AC,AB折起使得
与
重合,连结
,BN,如图2.
![](https://img.xkw.com/dksih/QBM/2022/3/1/2926906947182592/2929104516341760/STEM/eb28fd10-bcbd-424c-8f5a-69924b777928.png?resizew=287)
(1)证明:在图2中,
,且B,C,
,
四点共面;
(2)在图2中,若二面角
的大小为
,且
,求直线AB与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed6efbc21c48800ee73329b82b0e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f923a2d31e0052c466a253cafe5cbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b09b10f662479431978074c1a99f6b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2022/3/1/2926906947182592/2929104516341760/STEM/eb28fd10-bcbd-424c-8f5a-69924b777928.png?resizew=287)
(1)证明:在图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf21399dcf3682bf5d3f9cbd5eed86c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(2)在图2中,若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f77f400a3cf0acb19d4e4c7da2b80a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb724b29969ae90c1599ba7f2e2ae91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2022-03-04更新
|
1983次组卷
|
5卷引用:山东省潍坊市2022届高三一模统考(3月)数学试题
山东省潍坊市2022届高三一模统考(3月)数学试题江苏省南京市第五高级中学2022届高三下学期一模数学试题(已下线)江苏省南通市如皋市2022-2023学年高三上学期10月诊断调研测试数学试题(已下线)江苏省南通市如皋市2022-2023学年高三上学期期中模拟数学试题重庆市第一中学校2023-2024学年高二上学期12月定时练习数学试题
名校
解题方法
6 . 如图,已知长方体
中,
,
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/4/23/2705871768911872/2730927158935552/STEM/84e2b6ff-4d5f-49b4-aaf7-a0bcca6d6be4.png?resizew=192)
(1)求过
,
,
三点的截面的面积;
(2)一只小虫从
点经
上一点
到达
点,求小虫所经过路程最短时,直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462b1c65b1b233ab98a90c164c0968c7.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/4/23/2705871768911872/2730927158935552/STEM/84e2b6ff-4d5f-49b4-aaf7-a0bcca6d6be4.png?resizew=192)
(1)求过
![](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/6795cae2df43a722e1355e9562d93c09.png)
(2)一只小虫从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0593f7294dbd7a04fa494ea28b10e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06ed3e88f623ed9313d06b1bb2a87ee.png)
您最近一年使用:0次
2021-05-28更新
|
998次组卷
|
5卷引用:山东省实验中学2021届高三下学期一模数学试题
山东省实验中学2021届高三下学期一模数学试题新疆克拉玛依市第一中学2020-2021学年高二6月月考数学试题(已下线)热点07 立体几何中的向量方法-2022年高考数学【热点·重点·难点】专练(全国通用)(已下线)专题11 立体几何中的向量方法-2022年高考数学毕业班二轮热点题型归纳与变式演练(新高考专用)辽宁省沈阳市东北育才学校2021-2022学年高二上学期第一次月考数学试题
名校
7 . 如图,正方体
的棱长为1,点
在棱
上,过
,
,
三点的正方体的截面
与直线
交于点
.
![](https://img.xkw.com/dksih/QBM/2021/4/17/2701872321519616/2702437407539200/STEM/8c8791a4759147a2946a0da12426de3c.png?resizew=291)
(1)找到点
的位置,作出截面
(保留作图痕迹),并说明理由;
(2)已知
,求
将正方体分割所成的上半部分的体积
与下半部分的体积
之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2021/4/17/2701872321519616/2702437407539200/STEM/8c8791a4759147a2946a0da12426de3c.png?resizew=291)
(1)找到点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b45ff172cc611ca501688d9dc0175b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
您最近一年使用:0次
2021-04-18更新
|
2267次组卷
|
7卷引用:山东枣庄2021届高三数学二模试题
山东枣庄2021届高三数学二模试题(已下线)押新高考第19题 立体几何-备战2021年高考数学临考题号押题(新高考专用)(已下线)押第19题 立体几何-备战2021年高考数学(文)临考题号押题(全国卷2)(已下线)押第18题 立体几何-备战2021年高考数学(文)临考题号押题(全国卷1)安徽省合肥一六八中学2020-2021学年高一下学期期中数学试题广东省深圳市富源学校2020-2021学年高一下学期期中数学试题1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(文科)试题(十五)
解题方法
8 . 如图,在四棱锥
中,
平面
,
,
,
,
.
为
的中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/797487a7-944d-4cc4-8257-5bbda6857aa9.png?resizew=159)
(1)设点
在
上,且
,求证:
,
,
,
四点共面;
(2)求二面角
的余弦值.
![](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/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a923784f083b7f4777891afe06b44e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88454ace46996b99361d18e76189cdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/797487a7-944d-4cc4-8257-5bbda6857aa9.png?resizew=159)
(1)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557010ef2b20618df4771ac66daef18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74011b64ff147ac2f10c36a11ac1b34d.png)
您最近一年使用:0次
2020-07-30更新
|
564次组卷
|
2卷引用:山东省2020年普通高等学校招生统一考试数学必刷卷(二)