名校
1 . 如图,正方体
的棱长为1,则下列四个命题正确的是( )
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516884683612160/2517575443226624/STEM/635717d4-174b-4c1b-bdaf-2323f95d49a1.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a99be053c95aefbebe7460e50df572.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516884683612160/2517575443226624/STEM/635717d4-174b-4c1b-bdaf-2323f95d49a1.png?resizew=169)
A.若点![]() ![]() ![]() ![]() ![]() |
B.点![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.三棱柱![]() ![]() |
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2020-07-31更新
|
489次组卷
|
2卷引用:河北省唐山市曹妃甸区第一中学2020-2021学年高一下学期六月月考数学试题
2 . 如图所示,在正方体
中,
是
上一点,
是
的中点,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a148a5584e41408fc74f8bd386b5b8.png)
(Ⅰ)求证:
平面
;
(Ⅱ)求
与平面
所成的角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a148a5584e41408fc74f8bd386b5b8.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e89acc2b46a2ff0e61c894c56382b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a148a5584e41408fc74f8bd386b5b8.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2001266564153344/2002457559318528/STEM/4e52e6bd0e504d5bbb28d9ea1185fc78.png?resizew=149)
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解题方法
3 . 已知一四棱锥的三视图如图所示,则该四棱锥的较长侧棱与底面所成角的正切值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/374d5af5-7ed1-4a56-b198-5f386b77516b.png?resizew=193)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/374d5af5-7ed1-4a56-b198-5f386b77516b.png?resizew=193)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-03-22更新
|
325次组卷
|
2卷引用:河北省衡水中学2021届全国高三下学期第二次联合考试(II卷)数学(理)试题
4 . 在长方体
与平面
所成的角为
,则
的取值区间为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a581e2d17e4ae53a84d297c3ff1189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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5 . 将正方形ABCD沿对角线BD折成直二面角
,有如下四个结论:
①
;
②
是等边三角形;
③AB与平面BCD所成的角为60°;
④AB与CD所成的角为60°.
其中正确的结论是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
③AB与平面BCD所成的角为60°;
④AB与CD所成的角为60°.
其中正确的结论是( )
A.①②③ | B.②③④ | C.①②④ | D.①②③④ |
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2021-11-08更新
|
255次组卷
|
2卷引用:河北省秦皇岛市青龙满族自治县实验中学2022-2023学年高二上学期期末数学试题
解题方法
6 . 在正方体
中,
与平面
所成角是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
A.30° | B.45° | C.60° | D.90° |
您最近一年使用:0次
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7 . 如图,长方体
中,
,
,
是正方形
的中心,则直线
与平面
成的角的余弦值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19428edbb520c8ad2f1a7f63dc805eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://img.xkw.com/dksih/QBM/2020/4/14/2441506526019584/2441953154826240/STEM/16445a75a57e4d309067c16dc33ab0d8.png?resizew=188)
您最近一年使用:0次
2020-04-15更新
|
401次组卷
|
2卷引用:河北省石家庄市第二中学2019-2020学年高三下学期教学质量检测模拟数学(文)试题
名校
8 . 如图所示,在空间四边形ABCD中,AB、BC、CD、DA的长和两条对角线AC、BD都相等,且E为AD的中点,F为BC的中点,则直线BE和平面ADF所成的角的正弦值为________ .
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546899113926656/2549602754355200/STEM/164bbca7301744b492ba991846327a36.png?resizew=155)
您最近一年使用:0次
13-14高二下·山西·阶段练习
9 . 如图,在正方体
中,直线
与平面
所成的角的大小是
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572928027140096/1572928033079296/STEM/7dfce741-028b-480a-845f-fc1e11376f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572928027140096/1572928033079296/STEM/7dfce741-028b-480a-845f-fc1e11376f43.png)
A.90° | B.60° | C.45° | D.30° |
您最近一年使用:0次
2016-12-04更新
|
943次组卷
|
9卷引用:2015-2016学年河北省武邑中学高一下期中数学试卷
解题方法
10 . 如图,在三棱锥
中,平面
平面
,
,则直线
与平面
所成的角是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/eb5c643d-5213-4689-9351-383e5a36bf87.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e82c4db32f8bd225138f2011fd6ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a8aa6e7db5446b6d2ad17dd4f91c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/eb5c643d-5213-4689-9351-383e5a36bf87.png?resizew=147)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次