1 . 如图,四棱锥
中,
,
,
为
中点.
(1)证明:
平面
;
(2)若
平面
,
是边长为
的正三角形,求直线
与平面
所成的角.
![](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/83d8af1e40a1febb02025c503a1fcf13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8c7c8c8702adfbd6bcacc94a6bc661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://img.xkw.com/dksih/QBM/2018/6/4/1959949486522368/1961532367355904/STEM/0f7c1d8bf3bb41eaa3a43217f13dbd01.png?resizew=129)
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2 . 如图,四面体ABCD中,O,E分别是BD,BC的中点,CA=CB=CD=BD=2,AB=AD=
.
![](https://img.xkw.com/dksih/QBM/2018/2/28/1892119677173760/1895770480508928/STEM/123ca84b53944765871ba4e56cf9ebc8.png?resizew=132)
(1)求证:OE//平面ACD;
(2)求直线AC与平面BCD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2018/2/28/1892119677173760/1895770480508928/STEM/123ca84b53944765871ba4e56cf9ebc8.png?resizew=132)
(1)求证:OE//平面ACD;
(2)求直线AC与平面BCD所成角的正弦值.
您最近一年使用:0次
2018-01-28更新
|
566次组卷
|
4卷引用:河北省武邑中学2017-2018学年高二上学期期末考试数学(理)试题
名校
3 . 如图,在四棱锥
中,
平面
,底面是梯形
,
,且
,则下列判断错误的是
![](https://img.xkw.com/dksih/QBM/2017/12/5/1832060792750080/1834248951414784/STEM/cd835af4-d085-41ac-a6ac-8b7c3463d50e.png)
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49556a297991631d8b51ce53ffc9aa07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://img.xkw.com/dksih/QBM/2017/12/5/1832060792750080/1834248951414784/STEM/cd835af4-d085-41ac-a6ac-8b7c3463d50e.png)
A.![]() ![]() | B.![]() ![]() ![]() |
C.![]() | D.平面![]() ![]() |
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2017-12-08更新
|
524次组卷
|
5卷引用:河北省邢台市2017-2018学年高二上学期第三次月考数学(文)试题
名校
4 . 已知底面是正方形的直四棱柱
的外接球的表面积为
,且
,则
与底面
所成角的正切值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9920aacfbce2da74087432a10e35ea8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
5 . 在平面四边形
中,
,将
沿对角线
所在的直线折起,使平面
平面
,则直线
与平面
所成角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f022c2db24a9b8fdb4c0603653cf09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-10-08更新
|
764次组卷
|
8卷引用:河北省邢台市2017-2018学年高二上学期第一次月考数学(文)试卷
6 . 如图,在棱柱
中,侧棱
底面
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572928027140096/1572928033464320/STEM/b05b03fe-eddd-4d39-acda-c9182dbe7fe0.png)
(1)求证:
平面
;
(2)求直线
与平面
所成的角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44242282970702c5ddfe3e812c533647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ded7fda1dd77ece5897babd6285145.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/2016/7/22/1572928027140096/1572928033464320/STEM/b05b03fe-eddd-4d39-acda-c9182dbe7fe0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
2016-12-04更新
|
950次组卷
|
4卷引用:2015-2016学年河北省武邑中学高一下期中数学试卷
2015-2016学年河北省武邑中学高一下期中数学试卷安徽省阜阳市太和第一中学2020-2021学年高二(平行班)上学期开学考试数学试题(已下线)【新东方】【2020】【高二上】【期中】【HD-LP357】【数学】湖北省武汉中学2020-2021学年高二上学期期中数学试题
13-14高二下·山西·阶段练习
7 . 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
8 . 已知在正方体
中,点
是棱
的中点,则直线
与平面
所成角的正弦值是______ .
![](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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
您最近一年使用:0次