1 . 如图,直角梯形ABCD,
,
,
,
,E为AB中点,以DE为折痕把ADE折起,使点A到达点P的位置,且
,则( )
![](https://img.xkw.com/dksih/QBM/2020/12/21/2619181868171264/2620215035215872/STEM/4693e431-41b7-42c4-8517-4d37f018ff2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e276f8f232532c840157d989d99e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0371664a451e7e7c020c9a7ae0627f.png)
![](https://img.xkw.com/dksih/QBM/2020/12/21/2619181868171264/2620215035215872/STEM/4693e431-41b7-42c4-8517-4d37f018ff2a.png)
A.平面![]() | B.![]() |
C.二面角![]() ![]() | D.PC与平面PED所成角的正切值为![]() |
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解题方法
2 . 如图,在三棱柱
中,底面
是等边三角形,且
底面
,若
,则直线
与平面
所成角的正弦值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6342c849e098aabce939ca82ddab0547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/99a3d386-20c8-45b1-a36d-d2721f134b36.png?resizew=151)
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2020-09-12更新
|
293次组卷
|
2卷引用:江苏省扬州市仪征市第二中学2020-2021学年高一下学期5月第二次月考数学试题
解题方法
3 . 在正三棱柱
中,已知
,
在棱
上,且
,则
与平面
所成的角的正弦值为______ ,平面
与
所成二面角的余弦值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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2021-08-27更新
|
186次组卷
|
5卷引用:江苏省南通市通州区石港中学2022-2023学年高二下学期第三次阶段检测数学试题
江苏省南通市通州区石港中学2022-2023学年高二下学期第三次阶段检测数学试题(已下线)江苏省南通市如皋市2020-2021学年高一下学期期中数学试题第一章+空间向量与立体几何(能力提升)-2020-2021学年高二数学单元测试定心卷(人教B版2019选择性必修第一册)(已下线)专题06 第一章 复习与检测 核心素养练习-【新教材精创】2020-2021学年高二数学新教材知识讲学(人教A版选择性必修第一册)(已下线)模块三 专题3 小题满分挑战练(1)(人教B)
4 . 在正方体
中,
,
、
、
分别是棱
、
、
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
A.点![]() ![]() | B.直线![]() ![]() ![]() |
C.二面角![]() ![]() | D.三棱锥![]() ![]() |
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5 . 如图,在三棱锥
中,
,
.点
分别是
的中点,
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/5a7cc991-df3c-4b40-9f54-3c9ff4f1fc35.png?resizew=170)
(1)求证:
平面
.
(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/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856a8576b7ebb682ffc067a340915eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/416b76effe779372c74c0aa39dc44a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee0e55c7efee066cdb4cf3bb062ba1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc6f007dbf1c1a36eb031e520608403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/5a7cc991-df3c-4b40-9f54-3c9ff4f1fc35.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1876392a1e9031390a82af185fe307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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6 . 设
分别是正方体
的棱
上两点,且
,给出下列四个命题正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29fb67185648985ee00f25b3332d7690.png)
A.异面直线![]() ![]() ![]() |
B.![]() ![]() |
C.三棱锥![]() |
D.直线![]() ![]() ![]() |
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7 . 如图正方体
,取正方体六个面的中心
,
,
,
,
,
将其连接起来就得到了一个正八面体,下面说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/20180fe6-cde8-49a1-b3d3-235fa854c342.png?resizew=190)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/20180fe6-cde8-49a1-b3d3-235fa854c342.png?resizew=190)
A.![]() ![]() | B.![]() ![]() ![]() |
C.平面![]() ![]() | D.平面![]() ![]() |
您最近一年使用:0次
2020-12-30更新
|
240次组卷
|
3卷引用:江苏省南京市江宁高级中学2020-2021学年高三上学期迎接八省联考适应性练习数学试题
名校
解题方法
8 . 在正三棱锥
中,侧棱长为
,底面边长为
,则点
到平面
的距离为___________ ;
与面
所成角的余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
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9 . 正方体
中,
、
、
、
分别为
、
、
、
的中点,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/6128269b-e48e-47ce-83e4-1f1f387886c7.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/6128269b-e48e-47ce-83e4-1f1f387886c7.png?resizew=170)
A.![]() |
B.直线![]() ![]() ![]() |
C.平面![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
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10 . 棱长为2的正方体
中,点
,
,
分别是棱
,
,
的中点,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.平面![]() ![]() |
D.点![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次