名校
1 . 如图,矩形
和梯形
,
, 平面
平面
,且
,过
的平面交平面
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/f0e0e83f-f0a4-4206-919f-913bebd6f026.png?resizew=177)
(1)求证:
与
相交;
(2)当
为
中点时,求点
到平面
的距离:
(3)若平面
与平面
的夹角的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca7db45643a42a261d58214e6accbe8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62baf83ce124ffefb6c4cac49c29af16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/f0e0e83f-f0a4-4206-919f-913bebd6f026.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe38c885f29722c433022c4b2ae6211.png)
(3)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe38c885f29722c433022c4b2ae6211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd8a98e03f6bb5601c91e72e9102e44.png)
您最近一年使用:0次
名校
2 . 如图,在三棱一
中,
为等腰直角三角形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d9d697fb50f92380ba993b708b5204.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/5657326f-9e32-421e-a262-556be8c330a9.png?resizew=150)
(1)求证:
;
(2)若
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d9d697fb50f92380ba993b708b5204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a468dbc6b97e2941538cd428bb7a78d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/5657326f-9e32-421e-a262-556be8c330a9.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ade2d2263fd8233ea17390294d1d6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2022-12-18更新
|
532次组卷
|
2卷引用:北京市中国人民大学附属中学2022-2023学年高二上学期数学期末复习试题(3)
名校
3 . 已知直三棱柱
中,侧面
为正方形,
,E,F分别为
和
的中点,D为棱
上的动点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/55edc25a-1dac-4735-a073-bc8bd2e829c3.png?resizew=147)
(1)证明:
平面
;
(2)当
为何值时,平面
与平面
所成的夹角最小?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f60db833d4ff6b92c78029e8264ca1c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/55edc25a-1dac-4735-a073-bc8bd2e829c3.png?resizew=147)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7faff77beaccc4ff656bfcea13f416.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6c9a36e2ef7189317ae652c56e49c8.png)
您最近一年使用:0次
2022-12-12更新
|
373次组卷
|
2卷引用:北京市中国人民大学附属中学2022-2023学年高二上学期数学期末复习试题(1)
22-23高三上·北京·开学考试
名校
解题方法
4 . 如图,在直三棱柱
中,
,
,
是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/0f96f3d5-6d70-4b78-a02e-0b5e3729f589.png?resizew=128)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
平面
;
(2)若棱
上存在一点
,满足
,求
的长;
(3)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/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90e17995e2f71e297d94ae51c7e5b1f.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/2022/9/12/0f96f3d5-6d70-4b78-a02e-0b5e3729f589.png?resizew=128)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
(2)若棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904f240a519d7e1dbd6bb69ae4655a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
您最近一年使用:0次
2022-09-11更新
|
1701次组卷
|
4卷引用:北京市第四中学2023届高三上学期开学测试数学试题
(已下线)北京市第四中学2023届高三上学期开学测试数学试题辽宁省沈阳市第八十三中学2022-2023学年高二上学期开学考试数学试题河南省信阳市潢川高级中学2023-2024学年高二上学期第二次月考数学试题(已下线)第一章 空间向量与立体几何(压轴必刷30题4种题型专项训练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
解题方法
5 . 如图,在三棱柱
中,
,D为
中点,四边形
为正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/b3b86a94-a34a-40e1-9b61-a2f824c39653.png?resizew=145)
(1)求证:
平面
;
(2)再从条件①、条件②这两个条件中选择一个作为已知,求直线
与平面
所成角的正弦值.
条件①:
;
条件②:
.
注:如果选择条件①和条件②分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19313eda8aed25d59b3a1c59a3117634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/b3b86a94-a34a-40e1-9b61-a2f824c39653.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a4b438e2e6687c7cd55ea08bbaae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)再从条件①、条件②这两个条件中选择一个作为已知,求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7870cee007535b979d35bc7feab75616.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eabd2314dbe8bf1ef6e37a7befbb0c61.png)
注:如果选择条件①和条件②分别解答,按第一个解答计分.
您最近一年使用:0次
6 . 如图,在长方体
中,底面
是边长为2的正方形,
,E,F分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/6cab89c2-fd72-44c1-a5e0-d64293b834c0.png?resizew=156)
(1)求证:
∥平面
;
(2)设H在棱
上,且
,N为
的中点,求证:
平面
;并求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4893fbcb191420e06a239e63493626f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cab95678b6f65bc7d15f8f609352c9c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/6cab89c2-fd72-44c1-a5e0-d64293b834c0.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
(2)设H在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34648df9ac785a84ec3f01b005aed5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/247157c37eb7c3ae9ac5aa7efb69c3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
您最近一年使用:0次
2022-05-17更新
|
888次组卷
|
3卷引用:北京市朝阳区2022届高三二模数学试题
名校
7 . 如图,在三棱柱
中,四边形
是边长为4的正方形.再从条件①、条件②、条件③中选择两个能解决下面问题的条件作为已知.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/7a1b2aa1-233b-4777-8cff-97dbc11c5f37.png?resizew=169)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值;
(3)设
是
的中点,棱
上是否存在点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
平面
?若存在,求线段
的长;若不存在,说明理由.
条件①:
;
条件②:
;
条件③:平面
平面
.
注:如果选择多种方案分别解答,那么按第一种方案解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/7a1b2aa1-233b-4777-8cff-97dbc11c5f37.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02273296ef80813f45933d31a833f160.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4fcf607b0710d12aaabd17fd053d83.png)
条件③:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
注:如果选择多种方案分别解答,那么按第一种方案解答计分.
您最近一年使用:0次
2022-12-10更新
|
535次组卷
|
5卷引用:北京市对外经济贸易大学附属中学2023届高三上学期12月月考期末综合测试(一)数学试题
北京市对外经济贸易大学附属中学2023届高三上学期12月月考期末综合测试(一)数学试题北京市日坛中学2023届高三上学期12月月考数学试题北京市陈经纶中学2023-2024学年高二上学期期中考试数学试卷(已下线)黄金卷04(已下线)北京市西城区2022届高三二模数学试题变式题16-21
名校
解题方法
8 . 如图,在直角梯形
中,
.直角梯形
通过直角梯形
以直线
为轴旋转得到,且使得平面
平面
.M为线段
的中点,P为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899465969164288/2917464006377472/STEM/a15dd2f8-8d19-489a-bc32-357585124aa1.png?resizew=199)
(1)求证:
;
(2)当点P满足
时,求证:直线
平面
;
(3)是否存在点P,使直线
与平面
所成角的正弦值为
?若存在,试确定P点的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a611224a391b18f5b90b52eef74e0f9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899465969164288/2917464006377472/STEM/a15dd2f8-8d19-489a-bc32-357585124aa1.png?resizew=199)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a5c773af90119232d95de70286a5d2.png)
(2)当点P满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739d47c1e1293a33c333c7e917d5adcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07391ef575d28f09bc5cda0ff8130a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa23fa14f624ad8212bda55d321362f.png)
(3)是否存在点P,使直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4e7552a39c412d882766dbcd7eeb69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d2d3a6c8ede51780d483f6432f7057.png)
您最近一年使用:0次
名校
9 . 如图,在多面体
中,平面
平面
.四边形
为正方形,四边形
为梯形,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/f8a22a08-8dd6-4a3a-954c-7c662204f382.png?resizew=195)
(1)求证:
;
(2)求直线
与平面
所成角的正弦值;
(3)线段
上是否存在点
,使得直线
平面
? 若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](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/84f78015d1cce755eae8a2db74106902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/f8a22a08-8dd6-4a3a-954c-7c662204f382.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d0c688e55286443c9974797fc647f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6114761b369162cda06f08e31c23fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258ed4f5282317bb067a41104d559222.png)
您最近一年使用:0次
2022-02-14更新
|
441次组卷
|
2卷引用:北京市平谷区2021-2022学年高二上学期期末数学试题
名校
10 . 在四棱锥
中,
,
,
,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/dabd7acc-d279-4ce9-b730-ea9c5f2006d6.png?resizew=161)
(1)若
是
的中点,求证:
平面
;
(2)求证:
平面
;
(3)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.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/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/dabd7acc-d279-4ce9-b730-ea9c5f2006d6.png?resizew=161)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2022-08-21更新
|
1820次组卷
|
2卷引用:北京市延庆区2021-2022学年高二下学期期末数学试题