1 . 如图,已知矩形
所在平面与平面
垂直,在直角梯形
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/33c99ddc-673e-48e7-8d41-ad78000f6a82.png?resizew=168)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb55b4b96849ab53b0cb97332801b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb55b4b96849ab53b0cb97332801b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5f33fc17da76afec7d7dfcda096e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f6e53fed78ccd62a5a9d2f64938a96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153e87e7f8396a6f4e57a4e45867c4ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/33c99ddc-673e-48e7-8d41-ad78000f6a82.png?resizew=168)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9ee68a3fdc62a86e53d4048e8fc04e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335187895f612ce811414cfbedf89467.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd6a2215f47cdb01078326d245b1523.png)
您最近一年使用:0次
2022-12-18更新
|
344次组卷
|
5卷引用:河北省衡水市第十三中学2022-2023学年高二上学期质检(三)数学试题
名校
2 . 如图四边形ABCD是边长为3的正方形,DE⊥平面ABCD,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/ddd1f18a-082d-40c3-985b-bd1e6b59f15d.png?resizew=163)
(1)求证:AC⊥平面BDE;
(2)若BE与平面ABCD所成角为
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5852b8f3ecf394b98074432eafafbf84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/ddd1f18a-082d-40c3-985b-bd1e6b59f15d.png?resizew=163)
(1)求证:AC⊥平面BDE;
(2)若BE与平面ABCD所成角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f717b7d4d0978eec7330afec554c078.png)
您最近一年使用:0次
2022-12-18更新
|
621次组卷
|
5卷引用:河北省邯郸市第十中学2022-2023学年高二上学期期末数学试题
名校
解题方法
3 . 在平行六面体
中,底面ABCD是边长为a的正方形,侧棱
的长为b,且
.则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38bf4756f62bd6dc5e6ef109d7b37783.png)
A.![]() ![]() |
B.直线![]() ![]() |
C.![]() ![]() |
D.直线![]() ![]() |
您最近一年使用:0次
2022-12-17更新
|
252次组卷
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4卷引用:河北省邯郸市第十中学2022-2023学年高二上学期期末数学试题
名校
4 . 如图,四棱锥
中,
平面
,底面
是正方形,
,E为PC中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ed9fe480-9258-401d-9486-91c3e577ee09.png?resizew=208)
(1)求证:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.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/99926bf272cd757f0985c69b390ebcce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ed9fe480-9258-401d-9486-91c3e577ee09.png?resizew=208)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eaa13915786802de6a540d56dec821b.png)
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5 . 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:河北省张家口市部分学校2022-2023学年高二上学期期中数学试题
名校
解题方法
6 . 如图,在三棱锥
中,
平面
,
是正三角形,
,
,F是棱
上一点,且满足
,则异面直线
与
所成角的余弦值是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/23f2da35-daac-4e2c-92bc-2a39e3d3dbbe.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e530783dc49238736ed5c1157e6184dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac497d8a54faf63e16fef516e89b8ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/23f2da35-daac-4e2c-92bc-2a39e3d3dbbe.png?resizew=147)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-12-12更新
|
623次组卷
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6卷引用:河北省邢台市第二中学2022-2023学年高二上学期第一次月考数学试题
名校
7 . 如图①,在平面多边形ABCDE中,
,
为等腰直角三角形,四边形ABCD为等腰梯形,且
,沿AD将
折起,使得
,M为BC的中点,连接AM,BD,如图②.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/0e646831-934c-44b8-a6d4-a844e88e8916.png?resizew=414)
(1)证明:
;
(2)求直线DE与平面BEM所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7624907b562e102da1fdbb10bc43895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783a833992e0862211a15fec2d3e3dda.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/0e646831-934c-44b8-a6d4-a844e88e8916.png?resizew=414)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e309053297619d3b46fcec970b68509.png)
(2)求直线DE与平面BEM所成角的正弦值.
您最近一年使用:0次
2022-12-03更新
|
459次组卷
|
3卷引用:河北省邢台市2022-2023学年高二上学期第一次月考数学试题
名校
解题方法
8 . 如图,在三棱锥
中,
为正三角形,D为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/29d1e640-9f7b-4711-8cf7-dc976126ec96.png?resizew=260)
(1)求证:平面
平面
;
(2)若O为
中点,求平面
与平面
夹角;
(3)求点D到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c40b66d38e6d286a68add4b54f35d51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd8dc9af4920f1afb817e2c091b32a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/29d1e640-9f7b-4711-8cf7-dc976126ec96.png?resizew=260)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若O为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(3)求点D到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
解题方法
9 . 如图所示,在直三棱柱
中,
分别为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5f6141ba-8abb-49b7-8036-7b5983e9a33d.png?resizew=166)
(1)证明:平面
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8becd8bdd2f9125840267594223ba191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5f6141ba-8abb-49b7-8036-7b5983e9a33d.png?resizew=166)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97babc2abb18c1540d3a5504f7cf3fe.png)
您最近一年使用:0次
2022-11-10更新
|
214次组卷
|
4卷引用:河北省部分学校2022-2023学年高二上学期期中数学试题
名校
10 . 在长方体
中,底面
是边长为2的正方形,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/3bac2b27-9a61-44b5-a336-9e524061e193.png?resizew=170)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
.
(2)求
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/2501c41a2761d3e8371a3383fba33fda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc0454f72e6dba8d432c76491aedcce9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/3bac2b27-9a61-44b5-a336-9e524061e193.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
您最近一年使用:0次
2022-11-10更新
|
302次组卷
|
6卷引用:河北省部分学校2022-2023学年高二上学期期中数学试题