名校
解题方法
1 . 如图,在正方体
中,
为
的中点,则直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/0a2c6b6d-4fda-46e4-92cd-e0a0e1e40ddb.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e2c4e3e15e5b234af04535bf56bab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9fc213fec8d6285a2ae5daadb61677c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/0a2c6b6d-4fda-46e4-92cd-e0a0e1e40ddb.png?resizew=134)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-08-06更新
|
552次组卷
|
2卷引用:北京市西城区2020-2021学年高二下学期期末数学试题
2 . 如图1,
中,
,
,
,D,E分别是
,
的中点.把
沿
折至
的位置,
平面
,连接
,
,F为线段
的中点,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/72146627-7751-4568-b0ee-c7439c0bc1d4.png?resizew=296)
(1)求证:
平面
;
(2)当三棱锥
的体积为
时,求直线
与
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c72495428bbbd12cad3271b0654ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/72146627-7751-4568-b0ee-c7439c0bc1d4.png?resizew=296)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e0bd4b30dc777ac9da80f6baa3eb31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1112ffa328ed486ffc5e4a605eb510e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次
解题方法
3 . 如图所示,在三棱锥
中,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/7/22/2769777926070272/2776275817570304/STEM/17334d7a-30ed-471d-b181-dd965452adb4.png?resizew=241)
(1)求异面直线
与
所成角的余弦值;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26bca46ecf930713d5e28f77daa941cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd3e0e377aa9783f9d0bc3a29ef7d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105f1100148bbf6d789b9048281755a1.png)
![](https://img.xkw.com/dksih/QBM/2021/7/22/2769777926070272/2776275817570304/STEM/17334d7a-30ed-471d-b181-dd965452adb4.png?resizew=241)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,在三棱柱
中,点
是
的中点,
,
,
,
,设
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/7/14/2764100853088256/2774729231073280/STEM/f5bb942a-c3ec-4a14-beae-f79b8fde7d77.png?resizew=280)
(1)用
,
,
表示
,
;
(2)求异面直线
与
所成角的余弦值.
![](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/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5213d6ac74fb6044cab6927a3d2acaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88eb29c4831677919f1066fb14fc255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a2525dc74947c4e22a3955e1f8d67a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4400603d8bb6c3dd0f9f91fa37e86f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2155b0df6138e31024520f028bccbfa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d7a754af4f58ed00690780451dce9e.png)
![](https://img.xkw.com/dksih/QBM/2021/7/14/2764100853088256/2774729231073280/STEM/f5bb942a-c3ec-4a14-beae-f79b8fde7d77.png?resizew=280)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b1665a62f5b3c3b531b4b53d004172.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
您最近一年使用:0次
2021-07-29更新
|
684次组卷
|
6卷引用:四川省绵阳市2020-2021学年高二下学期期末数学(理科)试题
四川省绵阳市2020-2021学年高二下学期期末数学(理科)试题(已下线)专题8.6 空间向量及其运算和空间位置关系(练)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)专题21 盘点空间线线角的问题——备战2022年高考数学二轮复习常考点专题突破广东省东莞市塘厦水霖学校2023-2024学年高二上学期段考一数学试题福建省厦门第六中学2023-2024学年高二上学期期中考试数学试题(已下线)专题08 空间向量基底法在立体几何问题中的应用4种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
名校
解题方法
5 . 已知正四棱锥
,侧棱长是底面边长的2倍,
是
的中点,则
所成的角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411e7eaf3fd834ad094bcfa75fed5d1a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-07-23更新
|
788次组卷
|
5卷引用:黑龙江省哈尔滨市第六中学2020-2021学年高一下学期期末考试数学试题
黑龙江省哈尔滨市第六中学2020-2021学年高一下学期期末考试数学试题广东省肇庆市封开县渔涝中学2020-2021学年高一下学期期末数学试题(已下线)第04讲 空间向量的应用(教师版)-【帮课堂】(已下线)专题03 空间向量的应用- 2021-2022高二上学期数学新教材配套提升训练(人教A2019选择性必修第一册)(已下线)1.4空间向量的应用(专题强化卷)-2021-2022学年高二数学课堂精选(人教版A版2019选择性必修第一册)
名校
解题方法
6 . 如图,在平行六面体
中,以顶点A为端点的三条棱长度都为2,且两两夹角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/b02e7d9b-0ead-4aa2-b582-d0c88c36b6f3.png?resizew=174)
(1)求
的长;
(2)求
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/b02e7d9b-0ead-4aa2-b582-d0c88c36b6f3.png?resizew=174)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87470f6137cb2d3755bb229ab0dda909.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9146c5f1be07949fe8278022f4a9a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b680f91c4a693cc9ab2c23f2e9114ce.png)
您最近一年使用:0次
2021-07-22更新
|
899次组卷
|
4卷引用:黑龙江省双鸭山市第一中学2020-2021学年高一下学期期末数学试题
名校
解题方法
7 . 如图,在四棱锥
中,底面
是菱形,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753632147513344/2767720843534336/STEM/e02e3f5b4b9c403aa5d815be1dc016f6.png?resizew=178)
(1)若
,E为
的中点,求异面直线
与
所成角的大小;
(2)若
,求二面角
的大小;
(3)试求四棱锥
的体积
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9fa8832f98b5418a7d75892f7951b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3bf906a702ee1ede7aeadc9c93d54d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60bd1467044c0295b25b554248769186.png)
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753632147513344/2767720843534336/STEM/e02e3f5b4b9c403aa5d815be1dc016f6.png?resizew=178)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f88e011f6694ca0c9634ee5cdfce443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f88e011f6694ca0c9634ee5cdfce443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffbd0347827bd713b484ba20dffe0a40.png)
(3)试求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
您最近一年使用:0次
2021-07-19更新
|
1029次组卷
|
5卷引用:上海市实验学校2020-2021学年高二下学期期末数学试题
上海市实验学校2020-2021学年高二下学期期末数学试题(已下线)专题04 空间向量与立体几何的压轴题(二)-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)(已下线)第04讲 空间向量的应用(教师版)-【帮课堂】上海市松江二中2021-2022学年高二上学期期中数学试题上海市上海师范大学附属外国语中学2021-2022学年高二上学期12月月考数学试题
名校
解题方法
8 . 如图,在直角梯形
中,
,
,
,
,
、
分别是
、
的中点,沿
将梯形
翻折至
,使得平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/7dd0e818-59f5-451c-aa40-de5280b90156.png?resizew=294)
(1)求证:
;
(2)设
为
上的动点,当
取最小值时,求异面直线
与
所成角的大小;
(3)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c76e6c67644b8bad9bfe11c7ec3081d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4abb94d3b45964103f3a9585e69b3ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6480f384476190883f06c0289c7519.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/7dd0e818-59f5-451c-aa40-de5280b90156.png?resizew=294)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b48da67abdfa3f88dfb1819d3e2c8b.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0883dc3138f660c46f9d127e8bc881d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
(3)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4547fc5db833b7e0ce21dca639f72dad.png)
您最近一年使用:0次
名校
解题方法
9 . 已知正四面体
,
为
中点,
为
中点,
在线段
上一个动点(包含端点),则直线
与直线
所成角余弦值的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
10 . 如图,一个结晶体的形状为平行六面体
,其中,以顶点A为端点的三条棱长均为6,且它们彼此的夹角都是
,下列说法中不正确的是( )
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C.向量![]() ![]() ![]() |
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21卷引用:黑龙江省大庆市铁人中学2020-2021学年高二上学期期末考试数学(理)试题
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