名校
1 . 如图,在四棱锥E-ABCD中,平面CDE⊥平面ABCD,∠ABC=∠DAB=90°,EC=AD=2,AB=BC=1,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/619f3554-a81e-4dc3-8b96-3eea45564852.png?resizew=184)
(1)证明:AB⊥平面ADE;
(2)求直线EB与平面EAC所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb55961fe96e155242d18d98e5c2261.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/619f3554-a81e-4dc3-8b96-3eea45564852.png?resizew=184)
(1)证明:AB⊥平面ADE;
(2)求直线EB与平面EAC所成的角的正弦值.
您最近一年使用:0次
名校
2 . 国家主席习近平指出:中国优秀传统文化有着丰富的哲学思想、人文精神、教化思想、道德理念等,可以为人们认识和改造世界提供有益启迪.我们要善于把弘扬优秀传统文化和发展现实文化有机统一起来,在继承中发展,在发展中继承.《九章算术》作为中国古代数学专著之一,在其“商功”篇内记载:“斜解立方,得两壍堵.斜解壍堵,其一为阳马,一为鳖臑”.刘徽注解为:“此术臑者,背节也,或曰半阳马,其形有似鳖肘,故以名云”.鳖臑,是我国古代数学对四个面均为直角三角形的四面体的统称.在四面体
中,
平面
.
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760356260454400/2761304616468480/STEM/acdd4b31b8504295b1d47e95e3567ddf.png?resizew=455)
(1)如图1,若
、
、
分别是
、
、
三边的的中点,
在
上,且
,求证:
平面
;
(2)如图2,若
,垂足为
,且
,
,
,求直线
与平面
所成角的大小;
(3)如图2,若平面
平面
,求证:四面体
为鳖臑.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e1bf2cc650448488a19c6301125b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf468f5132e14ee1d8cc766808b11af.png)
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760356260454400/2761304616468480/STEM/acdd4b31b8504295b1d47e95e3567ddf.png?resizew=455)
(1)如图1,若
![](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/bd33764ff4efddfe11a98a609753715c.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec0d25fa88ea9f0b003b83b7e2fe88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f28f9f503c0a023ed7e78e48123cc95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/618c5704137191d21172232bdb26b4d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71807a35b3170fce28ee6edf4c00d083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
(3)如图2,若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1095b030f441de5fb223781b00f3dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb5255e2159617505e0c87d01437a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e1bf2cc650448488a19c6301125b31.png)
您最近一年使用:0次
2021-07-10更新
|
390次组卷
|
2卷引用:四川省成都市第七中学2020-2021学年高一下学期期末考试数学试题
名校
3 . 如图,四棱锥
的底面是正方形,
平面
,
.点
是
的中点,作
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/74e22484-1aa4-4ec2-8b98-0aa3047fc35a.png?resizew=183)
(1)设平面
与平面
的交线为
,试判断直线
与直线
的位置关系,并给出证明;
(2)求平面
与平面
所成的较小的二面角的余弦值;
(3)求直线
与平面
所成角的正切值.
![](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/829f9180ddd9aa1a0ee0dc520f4e0b5f.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/3b7b9bf7332256ac478041957fa2a55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/74e22484-1aa4-4ec2-8b98-0aa3047fc35a.png?resizew=183)
(1)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
您最近一年使用:0次
2021-08-30更新
|
869次组卷
|
4卷引用:四川省泸州市泸县第五中学2022-2023学年高一下学期期末数学试题
4 . 如图,四边形
为菱形,O为
与
的交点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/c330dabe-0d2b-4c9b-ab62-03ea6f77505f.png?resizew=142)
(1)求证:平面
平面
;
(2)若
,求
与平面
所成角的正弦值;
(3)若
,三棱锥
的体积为
,求三棱锥
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/c330dabe-0d2b-4c9b-ab62-03ea6f77505f.png?resizew=142)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa99c9e32c26c441503d4e7794178c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb8837a125041127658ef850e6656ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f73a0ca4e6c794242489066fddb6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b565e518d475a50358fedff2f0bb8dec.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在三棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51558357ecba499e5df1d5d5b156e9c9.png)
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/9fc26e2f-980b-4f4d-9391-18db688a9fa9.png?resizew=150)
(1)证明:
;
(2)若点
在线段
上,且直线
与平面
所成角的正弦值为
,求直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51558357ecba499e5df1d5d5b156e9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356bfa15fa2344ee2694e89e09f81652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/9fc26e2f-980b-4f4d-9391-18db688a9fa9.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa25143901063036f751fe1e592917df.png)
(2)若点
![](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/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83fb9ac8a18e78a4c56da79514b5ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
您最近一年使用:0次
2020-03-17更新
|
344次组卷
|
2卷引用:四川省宜宾市第四中学校2022-2023学年高三上学期期末考试数学(理)试题
解题方法
6 . 如图,在四棱锥中
中,
,
,
,
,
是正三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/fefe71de-e744-4ee3-9525-7dd09fcaaee8.png?resizew=142)
(1)求证:
;
(2)求
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/58c9d5c0b9d7b7cf3e14f56bc3b4ac2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6914d401b0e7099dbea8ebdd5052ee7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/fefe71de-e744-4ee3-9525-7dd09fcaaee8.png?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530f462e5ec1e58c46e1f7644d0cc21.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2020-02-27更新
|
1407次组卷
|
3卷引用:四川省内江市2019-2020学年高二上学期期末数学(理)试题
7 . 如图,已知
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852d9e14fa82e578158cbf961d079d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d954a105c21f72c615d67e3ef80fda78.png)
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/4f20edb3-037b-427f-a334-ab1612c26d73.png?resizew=139)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852d9e14fa82e578158cbf961d079d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d954a105c21f72c615d67e3ef80fda78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d31958388143741b9cb32dba9af11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/4f20edb3-037b-427f-a334-ab1612c26d73.png?resizew=139)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286fa8a5d88da060a6d6bea468996283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7f072f0834ebdf155abc5dcc9c8d99.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7f072f0834ebdf155abc5dcc9c8d99.png)
您最近一年使用:0次
2019-12-03更新
|
614次组卷
|
2卷引用:四川省雅安市2019-2020学年高一下学期期末考试数学试题
8 . 如图1,ABCD为菱形,∠ABC=60°,△PAB是边长为2的等边三角形,点M为AB的中点,将△PAB沿AB边折起,使平面PAB⊥平面ABCD,连接PC、PD,如图2,
![](https://img.xkw.com/dksih/QBM/2020/1/10/2374139253850112/2374934092824576/STEM/bb68959d-48fa-4e96-9181-d77cd8f8fa48.png)
(1)证明:AB⊥PC;
(2)求PD与平面ABCD所成角的正弦值
(3)在线段PD上是否存在点N,使得PB∥平面MNC?若存在,请找出N点的位置;若不存在,请说明理由
![](https://img.xkw.com/dksih/QBM/2020/1/10/2374139253850112/2374934092824576/STEM/bb68959d-48fa-4e96-9181-d77cd8f8fa48.png)
(1)证明:AB⊥PC;
(2)求PD与平面ABCD所成角的正弦值
(3)在线段PD上是否存在点N,使得PB∥平面MNC?若存在,请找出N点的位置;若不存在,请说明理由
您最近一年使用:0次
2020-01-11更新
|
1019次组卷
|
8卷引用:四川省成都市温江区2018-2019学年高一下学期期末数学试题
9 . 在四棱锥
中,底面
是平行四边形,
平面
,点
,
分别为
,
的中点,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/8ea93558-85f5-4ccf-9a6b-55f5e01f40c2.png?resizew=167)
(1)证明:
平面
;
(2)求直线
与平面
所成角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e240a6378adf6d23ebf9cc710c9bd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/8ea93558-85f5-4ccf-9a6b-55f5e01f40c2.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02438f0423acd0ff2dfa5ffb6abf143f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
10 . 在三棱柱
中,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce3cec96c4e1314eca67595920d726e.png)
,
,
是线段
上的中点.
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010129394106368/2012968273346560/STEM/f5eadc7aad114e2e9016231639e84a4a.png?resizew=163)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc61a2aa5d8aebe6773d235f31ed81f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce3cec96c4e1314eca67595920d726e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010129394106368/2012968273346560/STEM/f5eadc7aad114e2e9016231639e84a4a.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
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