解题方法
1 . 在正方体ABCD—A1B1C1D1中,异面直线
和
分别在上底面A1B1C1D1和下底面ABCD上运动,且
,若
与
所成角为60°时,则
与侧面ADD1A1所成角的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057cdb4057bca398a838e868efd360f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.30° | B.45° | C.60° | D.90° |
您最近一年使用:0次
2020-10-03更新
|
1524次组卷
|
6卷引用:河南省名校联盟2020-2021学年高三9月质量检测数学文科试题
河南省名校联盟2020-2021学年高三9月质量检测数学文科试题贵州省贵阳为明教育集团2021届高三第一次调研理科数学试题(已下线)专题8.7 立体几何中的向量方法(精练)-2021年新高考数学一轮复习学与练吉林省通榆县第一中学2020-2021学年高三上学期第四次质量检测数学(文)试题人教A版(2019) 选修第一册 实战演练 第一章 验收检测(已下线)专题 1.2空间向量:求距离与角度13种题型归类(2)
解题方法
2 . 已知直四棱柱
的所有棱长相等,
,则直线
与平面
所成角的正切值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4e574c9d139615d991a168cfbf63b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
3 . 如图,在三棱柱
中,
是边长为2的等边三角形,平面
平面
,四边形
为菱形,
,
与
相交于点D.
(1)求证:
.
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5f9ef971747d2d5bbc5823797a7a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140088b0cb73812aa9d523c44559298a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a252001e9b7edcba240973a32ab3fb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/e8ee0cea-3dd2-45dc-9889-74bf5ac30626.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d57d82c046d22a1484e1c23ddbc9ee.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
您最近一年使用:0次
2020-09-26更新
|
811次组卷
|
8卷引用:安徽省皖南八校2020-2021学年高三上学期摸底联考理科数学试题
安徽省皖南八校2020-2021学年高三上学期摸底联考理科数学试题(已下线)2021届普通高等学校招生全国统一考试数学考向卷(七)(已下线)专题19 立体几何综合-2020年高考数学母题题源全揭秘(浙江专版)内蒙古赤峰二中2020-2021学年高二上学期第二次月考数学(理)试题辽宁省凌源市2020-2021学年下学期高二尖子生抽测数学试题云南省曲靖市会泽县茚旺高级中学2020-2021学年高二春季6月月考数学(理)试题陕西省榆林市绥德中学2020-2021学年高二下学期6月质量检测理科数学试题云南省临沧市民族中学-2022-2023学年高二上学期期末数学试题
4 . 如图,在直三棱柱
中,点
、
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc67479f-01e4-4abd-8307-1cf201bdd9ea.png?resizew=201)
(1)证明:
平面
;
(2)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc67479f-01e4-4abd-8307-1cf201bdd9ea.png?resizew=201)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d355b4c58b4e883b9e65cc6da8622e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
您最近一年使用:0次
2020-09-25更新
|
932次组卷
|
3卷引用:四川省巴中市2021届高三零诊考试数学(理)试题
名校
5 . 如图,
为圆锥的顶点,
为底面圆心,点
,
在底面圆周上,且
,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/6eac220e-36d5-4924-8579-2cb8998cc878.png?resizew=141)
求证:
;
若圆锥的底面半径为
,高为
,求直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/6eac220e-36d5-4924-8579-2cb8998cc878.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464e16e3387532eb66521b4e97791cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97fa483ce5e3575ff399722caba7b943.png)
您最近一年使用:0次
2020-09-22更新
|
1467次组卷
|
7卷引用:河南省中原名校联盟2020-2021学年高三上学期第一次质量考评数学(理科)试题
解题方法
6 . 如图,在三棱锥
中,
,
,
分别为棱
,
,
的中点.已知
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3f534203-fe09-4dd5-b4da-b465d33c5f6c.png?resizew=132)
(1)证明:平面
平面
;
(2)若
,
,
为
中点,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d9ef979b9f27a28cbda6923e888ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3f534203-fe09-4dd5-b4da-b465d33c5f6c.png?resizew=132)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-09-05更新
|
945次组卷
|
2卷引用:新高考课改专家2021届高三数学命题卷试题
名校
解题方法
7 . 如图,在直三棱柱
中,
,
,
,
分别是棱
,
的中点,点
在直线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/eb0b7fcf-ffe2-4f29-98d5-316761b24085.png?resizew=151)
(1)求直线
与平面
所成的角最大时,线段
的长度;
(2)是否存在这样的点
,使平面
与平面
所成的二面角为
,如果存在,试确定点
的位置;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bdbf17f7bb0e70a339b4a1971d5c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/eb0b7fcf-ffe2-4f29-98d5-316761b24085.png?resizew=151)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
(2)是否存在这样的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2020高三·江苏·专题练习
解题方法
8 . 如图,在四棱锥
中,
,
,
两两垂直,
,
,
,
为线段
上一点(端点除外).
![](https://img.xkw.com/dksih/QBM/2020/8/24/2534960207273984/2537454237376512/STEM/d6119ea2-f477-4a81-9c5d-5934421986f9.png)
(1)若异面直线
,
所成角的余弦值为
,求
的长;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58097af4081e62c2ec10c006828fa544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2020/8/24/2534960207273984/2537454237376512/STEM/d6119ea2-f477-4a81-9c5d-5934421986f9.png)
(1)若异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
名校
9 . 如图,在三棱锥
中,已知
都是边长为
的等边三角形,
为
中点,且
平面
,
为线段
上一动点,记
.
![](https://img.xkw.com/dksih/QBM/2020/8/24/2534960207273984/2537454237327360/STEM/8548a81b-a78a-4c35-bccd-63a475cc814d.png)
(1)当
时,求异面直线
与
所成角的余弦值;
(2)当
与平面
所成角的正弦值为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5414bf0f51ceb7f2c3bc9b16cf4ba9c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89673684a25aedb9d800f192bc4291f2.png)
![](https://img.xkw.com/dksih/QBM/2020/8/24/2534960207273984/2537454237327360/STEM/8548a81b-a78a-4c35-bccd-63a475cc814d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f75c42c77264076166fff76cfab4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-08-28更新
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838次组卷
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8卷引用:江苏省扬州市2020届高三下学期6月最后一卷数学试题
江苏省扬州市2020届高三下学期6月最后一卷数学试题(已下线)【理科附加】专题04 空间点、直线、平面之间的位置关系-2020年高考数学母题题源解密(江苏专版)江苏省盐城市滨海县八滩中学2020届高三下学期高考模拟考试(二)数学试题江苏省邗江中学2017-2018学年高二下学期期中考试数学(理)试题江苏省泰州市泰州中学2018-2019学年高二下学期期中考试数学(理)试题福建省三明第一中学2019-2020学年高二上学期期中考试数学试题(已下线)【新东方】杭州新东方高中数学试卷328(已下线)第一章 空间向量与立体几何 单元测试-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第一册)
解题方法
10 . 在正四面体
中,
,
分别为棱
、
的中点,设
,
,
,用
,
,
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______ ,异面直线
与
所成角的余弦值为______ .
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2020-08-26更新
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12卷引用:信息必刷卷01(上海专用)
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