如图,在三棱锥
中,
,
,
,
,二面角
为钝角,三棱锥
的体积为
.
(1)求二面角
的大小;
(2)求直线AP与平面PBC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dee6c1410e79934b560642684807e70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f56065a61961d67fdee6829fd6568b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/2ef38f40-5413-472f-9299-659360ea6e11.png?resizew=156)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
(2)求直线AP与平面PBC所成角的正弦值.
23-24高三上·山西朔州·开学考试 查看更多[4]
山西省朔州市怀仁市第一中学校等学校2024届高三上学期摸底数学试题河南省郑州外国语学校2023-2024学年高三上学期第一次调研考试数学试题(已下线)第02讲 空间向量的应用(2)(已下线)专题6-3立体几何大题综合归类-2
更新时间:2023-08-06 00:29:34
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相似题推荐
解答题-证明题
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适中
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【推荐1】如图,几何体ABCDE中,△ABC是正三角形,EA和DC都垂直于平面ABC,且EA=AB=2a, DC=a,F、G分别为EB和AB的中点.
![](https://img.xkw.com/dksih/QBM/2011/5/5/1570179645661184/1570179650772992/STEM/f1e20a761916406292aa1b6f61cede73.png?resizew=161)
(1)求证:FD∥平面ABC;
(2)求证:AF⊥BD;
(3) 求二面角B—FC—G的正切值.
![](https://img.xkw.com/dksih/QBM/2011/5/5/1570179645661184/1570179650772992/STEM/f1e20a761916406292aa1b6f61cede73.png?resizew=161)
(1)求证:FD∥平面ABC;
(2)求证:AF⊥BD;
(3) 求二面角B—FC—G的正切值.
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【推荐2】如图,在棱长为2的正方体
中,点
为线段
的中点.
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
平面
;
(2)求二面角
的余弦值.
![](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/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/dbe61905-01f7-4f94-9d68-564cae562beb.png?resizew=159)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1774d0570a0ecfcdeb274828d7f4a769.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad85704db62a33b112892bf9c501b19e.png)
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【推荐3】如图,在正方形ABCD中,点E是AB的中点,点F是BC的中点,将△AED,△DCF分别沿DE,DF折起,使A,C两点重合于P,连接EF,PB.
(1)求证:
;
(2)点M是PD上一点,若
平面EFM,则
为何值?并说明理由;
(3)若
,求二面角
的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/e1d57202-84cc-4ab8-b4fd-54dbcf6ed984.png?resizew=333)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55bc62f8afd58b044a0c24bf361d0c5.png)
(2)点M是PD上一点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced22fbe85d4a749c7b0b6bbae3ea3e7.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33458ba13d7c6278f6b9318e78ba917f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948382a4c75dbb1dec52b444335989f1.png)
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解答题-问答题
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适中
(0.65)
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解题方法
【推荐1】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)
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解答题-证明题
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适中
(0.65)
名校
解题方法
【推荐2】在长方体
中,
,
,E为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/8541e781-6255-44fa-a375-427945769934.png?resizew=134)
(1)证明:
;
(2)求DE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/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/8541e781-6255-44fa-a375-427945769934.png?resizew=134)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd90dd9df8047d6093a7fb228245bec3.png)
(2)求DE与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
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解答题-问答题
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【推荐3】如图所示,平面
平面
,底面
是边长为8的正方形,
,点E,F别是
的中点
![](https://img.xkw.com/dksih/QBM/2022/3/6/2930623186370560/2936815720022016/STEM/ffcc54f4-72cc-458a-b839-cb04bf50263c.png?resizew=175)
(1)证明:
平面
;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.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/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de9305351ad1478c85dbc9d576a55fb.png)
![](https://img.xkw.com/dksih/QBM/2022/3/6/2930623186370560/2936815720022016/STEM/ffcc54f4-72cc-458a-b839-cb04bf50263c.png?resizew=175)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101cb6a0840ab7269e90f2f019cd957b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff7ad82b0938145af6a5ffa2c9596d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次