如图,在四棱锥中,底面
为直角梯形,
,
,
,
,
,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2020/4/7/2436227523207168/2437009965178880/STEM/5379527a3e8e42cfa284f7a902f50283.png?resizew=279)
(Ⅰ)求直线
与平面
所成角的余弦值;
(Ⅱ)求二面角
的大小;
(Ⅲ)若
在段
上,且直线
与平面
相交,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b43ad03f999c06bd85d470c03a86e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfc9df9c661bd93b3f4f51f91534c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdb036cdf73e828391c307568905ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2020/4/7/2436227523207168/2437009965178880/STEM/5379527a3e8e42cfa284f7a902f50283.png?resizew=279)
(Ⅰ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b2857b27a9ac7c6c9f87f6217caa49.png)
20-21高三上·北京密云·期末 查看更多[6]
2020届北京市密云区高三上学期期末数学试题天津市新华中学2020-2021学年高三上学期第一次月考数学试题(已下线)第01章 空间向量与立体几何(B卷提高卷)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教A版)天津市咸水沽第一中学2020-2021学年高三上学期第一次月考数学试题天津市武清区英华国际学校2021-2022学年高三上学期第一次月考数学试题天津市西青区张家窝中学2021-2022学年高三上学期11月月考数学试题
更新时间:2020-04-08 12:52:22
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图所示,四棱锥的侧面
为边长为
的正方形,且
,
为棱
的中点,
为棱
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/23f432e4-671f-4379-8117-4587b83e6ff8.png?resizew=270)
(1)求证:
平面
;
(2)求直线
与平面
所成角的余弦值;
(3)线段
上是否存在一点
使得平面
与平面
所成角的余弦值为
,若存在,求出点
到平面
的距离;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca999a4141b000334fec029ce268c1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/23f432e4-671f-4379-8117-4587b83e6ff8.png?resizew=270)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f239fbcc58fc15535db4b5084c4f7253.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f239fbcc58fc15535db4b5084c4f7253.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193b5b41994c2a4dfa5bb0bc984061cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f239fbcc58fc15535db4b5084c4f7253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83303d3784492506fc44f2b4d6b07bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f239fbcc58fc15535db4b5084c4f7253.png)
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【推荐2】已知在四棱锥
中,底面
是边长为2的正方形,
是正三角形,
平面
,O是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/c5c538ff-19e5-4814-8d3e-ce4952f7f6f4.png?resizew=179)
(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/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/c5c538ff-19e5-4814-8d3e-ce4952f7f6f4.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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解答题-证明题
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【推荐1】如图,在四棱锥P—ABCD中,底面ABCD是矩形,PD⊥平面ABCD,M是棱PC的中点,点N在棱PB上,且MN⊥PB.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939484960694272/2944654749179904/STEM/8bd44f38-2578-4ead-aca5-3f0e27a3a43a.png?resizew=184)
(1)求证:
平面BMD;
(2)若AD=2CD,直线PC与平面ABCD所成的角为60°,求平面DMN与平面PAD所成的锐二面角的余弦值.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939484960694272/2944654749179904/STEM/8bd44f38-2578-4ead-aca5-3f0e27a3a43a.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
(2)若AD=2CD,直线PC与平面ABCD所成的角为60°,求平面DMN与平面PAD所成的锐二面角的余弦值.
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解答题-证明题
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适中
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【推荐2】如图,三棱柱
中,
面
,
为
的中点.
(1)求证:
面
;
(2)求二面角
的余弦值;
(3)在侧棱
上是否存在点
,使得
面
? 并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62996650dd61ab72975c0b238ed2c203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5bfd70c87a325a9491404bb0d397d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111e7f12b82c1e650511a9e006e4ad78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd190b5a26dfb45a06c1d6ee86dd82d9.png)
(3)在侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245440d3761fb4217eaa8dc303fa288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
![](https://img.xkw.com/dksih/QBM/2010/12/20/1569941239939072/1569941245116416/STEM/a4453187-1430-4933-8f5b-f69314c0b569.png?resizew=208)
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