如图,已知圆台
的下底面半径为2,上底面半径为1,母线与底面所成的角为
为母线,平面
平面
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966603934867456/2971240273485824/STEM/4ec3219b-03e8-43b5-89a8-1065b806c921.png?resizew=256)
(1)证明:平面
平面
;
(2)当点
为线段
的中点时,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0a4f38420bb9215dbc9c875b755838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aad0fd1f6be95656b17ad937cb51c6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550d549789c10796087d258cf1d1bde7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ab35b3793bbd542738c481937772fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966603934867456/2971240273485824/STEM/4ec3219b-03e8-43b5-89a8-1065b806c921.png?resizew=256)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4080387bf118a3b382ede20ce8d60e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945d27bb4d47e78d472186cb02314a8b.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd9c299d7ed6e96cd09cae67d7bba41.png)
2022·湖南衡阳·二模 查看更多[3]
湖南省衡阳市2022届高三下学期二模数学试题(已下线)考点18 空间中的角度和距离问题-1-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)江苏省郑梁梅高级中学2022-2023学年高二下学期4月月考数学试题
更新时间:2022-05-03 07:46:43
|
相似题推荐
【推荐1】如图1,在平面四边形
中,
.将
沿
折叠至
处.使平面
平面
(如图2),
分别为
的中点.
平面
;
(2)求点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626ea781a1b78eed09dfb4fa6c555f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
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适中
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解题方法
【推荐2】如图,在四棱锥
中,底面
为菱形,
,
,
分别是棱
,
,
的中点,且
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/495368c0-93c0-441e-8934-85442997d9e4.png?resizew=170)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff94ae7692477febffe53b03f06e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/495368c0-93c0-441e-8934-85442997d9e4.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9abe6e8d1f4f1e8bdc46ddbae0cd789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f129bc3e3b94149cbf6ac87effe863cc.png)
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适中
(0.65)
名校
【推荐1】图中组合体由一个棱长为2的正方体
和一个四棱锥
组成(
平面
.
,
,
三点共线,
),
是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/2f6a57d5-4bc7-4fec-880d-ff6404be234e.png?resizew=168)
(1)求证:
平面
;
(2)点
在棱
上靠近
的三等分点,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/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76d296e1cf0e421b3969c70064f6fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/2f6a57d5-4bc7-4fec-880d-ff6404be234e.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30e2f7b22d83bef3421a4ecc7ed4a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,菱形ABCD与正三角形DEF所在平面互相垂直,∠BCD=60°,E,G分别是线段AB,CF的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/d11cb53d-7dd5-4586-87d9-cbcc363bf7b0.png?resizew=178)
(1)求证:BG∥平面DEF;
(2)求直线BC与平面DEG所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/d11cb53d-7dd5-4586-87d9-cbcc363bf7b0.png?resizew=178)
(1)求证:BG∥平面DEF;
(2)求直线BC与平面DEG所成角的正弦值.
您最近一年使用:0次