如图,在多面体
中,四边形
是正方形,
平面
,
,
,
·
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716531990036480/2718645971574784/STEM/fe76e782-914a-476c-a423-4d0843934583.png?resizew=224)
(1)求证:
平面
.
(2)求异面直线
与
所成角的余弦值.
(3)若点
是线段
上的一个动点,试确定点
的位置,使得二面角
的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26fdaf049899c52eedf5eb4dcddec62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2f042901f9931fcc9b418752261d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd182e26dbd32212e9842057093d468c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7579755d7d17bd72d97b03df323aefa4.png)
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716531990036480/2718645971574784/STEM/fe76e782-914a-476c-a423-4d0843934583.png?resizew=224)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1496afecd92a619fbe5e9b736f06f4e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d93daae6ec80968c0630e229c1fa1b84.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ab63b71d1015677e5fec02e2fc5bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
2021·天津滨海新·三模 查看更多[4]
天津市滨海新区塘沽第一中学2021届高三下学期第三次模拟考试数学试题(已下线)专题02 异面直线所成角-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)天津市新华中学2022-2023学年高三上学期12月第二次月考数学试题天津市朱唐庄中学2023-2024学年高三上学期期中热身数学试题
更新时间:2021-05-11 10:42:17
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解题方法
【推荐1】如图,在三棱柱
中,
平面ABC,
,
,D为
的中点,
交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/2d09c7d1-0d69-42c1-8e06-5ce03508846e.png?resizew=147)
(1)证明:
;
(2)求点E到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ba846c4dec057a9eec4174306efd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb5abdd2a03d00be92c60c7a30b7fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/2d09c7d1-0d69-42c1-8e06-5ce03508846e.png?resizew=147)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73616ee0a39a5c84c6635b3840880b5.png)
(2)求点E到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dddfef906818cc8ddd00f867b77f227.png)
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【推荐2】如图甲所示,在矩形
中,
,
,
为
的中点,沿
将
翻折,使
折至
处,且二面角
为直二面角(如图乙).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/cf8a7ccc-2738-4ba2-a8fc-9328cb757755.png?resizew=363)
(1)求证:
;
(2)求二面角
的平面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c35e8cf7b77cda3a23aaca62cd937f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/cf8a7ccc-2738-4ba2-a8fc-9328cb757755.png?resizew=363)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c75d1b97dc32e2b99bccd4d8a02ef17.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad62b80feae91ae4004efefcc6130ee1.png)
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【推荐1】如图,已知直四棱柱
中,
底面
是直角梯形,
为直角,
.
(1)求线段
的长度;
(2)异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212f4416ce8fcd69b531ceda6f6ebfbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06cea653092999d4c9a9e0b4f1955950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e3a608f2a8e6f031e7446937a26016.png)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
(2)异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/b1b976b9-06d3-4df0-8dc1-b53b0a1962ea.png?resizew=152)
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解题方法
【推荐2】如图,在平行六面体
中,
,
,
,
,求
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd21a4e45dc1beb069d7e78f84a51544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd9d019049d674199cde7f64e65bbc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037b1a3ec2e37bbcb05d0a467efb511.png)
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【推荐1】在如图所示的几何体中,平面
平面
,四边形
为平行四边形,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695269528625152/2716889122701312/STEM/f95f92f8-3952-481a-9572-c8aaafbb9e00.png?resizew=311)
(1)求证:
,
,
,
四点共面,且平面
平面
;
(2)若二面角
的大小为45°,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.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/357d9412cb6b277a3e317d99135ab64b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d459cad63e3cd2aba10862800fa4832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a4c9a32fe02c162f0521a0a01be263e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4361290ed4d04b75030f821e35d5a1de.png)
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695269528625152/2716889122701312/STEM/f95f92f8-3952-481a-9572-c8aaafbb9e00.png?resizew=311)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c9c2c831a0552a7c934365bc49ad3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
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【推荐2】如图,在四棱锥
中,底面ABCD是直角梯形,
,
,
底面ABCD,点E为棱PC的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/cb23c0cd-f646-4594-aad1-c1475d1b1869.png?resizew=215)
(1)证明:
平面PAD;
(2)在棱PC上是否存在点F,使得二面角
的余弦值为
,若存在,求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037afbe66e15832d3ac4ff3694c7c2fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/cb23c0cd-f646-4594-aad1-c1475d1b1869.png?resizew=215)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
(2)在棱PC上是否存在点F,使得二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7c507504932bbd38c9d21d31b943a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83fb9ac8a18e78a4c56da79514b5ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243fcd0b5e7fc1a4d55e191f5fcbd332.png)
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【推荐3】如图,在四棱锥
中,平面
平面
,点
在棱
上,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/08ea6e3d-5edb-4888-9349-fc96900c9eab.png?resizew=186)
(1)证明:
.
(2)设二面角
的平面角为
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9772edb4ec7db3eab5e2bd00936ee21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6822db67464507ee6997b93103003a36.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/08ea6e3d-5edb-4888-9349-fc96900c9eab.png?resizew=186)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dac702fe64edf1bc265da4b98cf2a0.png)
(2)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbeab80976db9b4689b9446cda06196a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7f904c086a749da7b7f8e26213a3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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