已知
平面ABCD,ABCD是正方形,异面直线PB与CD所成的角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/cfa756cd-67d1-4811-a900-5022707d198f.png?resizew=165)
(1)二面角
的大小;
(2)直线
与平面
所成的角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/cfa756cd-67d1-4811-a900-5022707d198f.png?resizew=165)
(1)二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
22-23高一·全国·课后作业 查看更多[6]
沪教版(2020) 必修第三册 高效课堂 第十章 10.4平面与平面位置关系(2)(已下线)第八章:立体几何初步 重点题型复习(2)(已下线)8.6.3 平面与平面垂直(1)-2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(人教A版2019必修第二册)(已下线)专题8.16 空间角大题专项训练(30道)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)(已下线)专题8.13 空间直线、平面的垂直(二)(重难点题型精讲)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)(已下线)专题强化二:异面角、线面角、二面角的常见解法 (2)
更新时间:2023-02-06 09:04:44
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相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知直角梯形
,沿
将
折起,使得A到P的位置,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755444996923392/2780170889699328/STEM/359fa32d61ff49fc8c5f618d25be9274.png?resizew=196)
(1)求证:
;
(2)若点E为棱
上一点,且
,求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895bc552ab8fc2a928bf141cba94d2f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755444996923392/2780170889699328/STEM/359fa32d61ff49fc8c5f618d25be9274.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60334b062acf697efaa4f3f7087a80dc.png)
(2)若点E为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114b0e077ac80005b99398d2e669d5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
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名校
【推荐2】如图,在直角梯形
中,
,
,
,
,
,点
在
上,且
,将
沿
折起,使得平面
平面
(如图),
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/528dd422-4ce3-4b3b-a6a6-0e7ed1b6b9a8.png?resizew=411)
(1)求证:
平面
;
(2)求直线
与平面
所成的角的正弦值.
(3)在线段
上是否存在点
,使得
平面
?若存在,求
的值;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/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40560ea08d6cd8c1d4d9661ee6faaa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/528dd422-4ce3-4b3b-a6a6-0e7ed1b6b9a8.png?resizew=411)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cf187bc2ede965870b90757b495f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93651f094df56f6b87fbd1d12c7a3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747978ec67fee6ee9eb07d02b80987d7.png)
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解答题
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解题方法
【推荐1】将图①中正方形
沿着对角线
对折,并使平面
平面
,从而构成图②中的三棱锥
,点
、
分别是线段
、
的中点.请在图②的三棱锥中解答如下问题:
![](https://img.xkw.com/dksih/QBM/2015/12/22/1572375610859520/1572375617167360/STEM/f7bc72c4a7cc4413b9facd0a40ef723f.png?resizew=387)
(1)求二面角
的正切值;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://img.xkw.com/dksih/QBM/2015/12/22/1572375610859520/1572375617167360/STEM/f7bc72c4a7cc4413b9facd0a40ef723f.png?resizew=387)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec2524be492bca0d1566bf848066f10.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】已知矩形ABCD中,AB=6,BC=
,E为AD的中点(图一).沿BE将△ABE折起,使二面角A—BE—C为直二面角(图二),且F为AC的中点.
(1)求证:FD//平面ABE;
(2)求二面角E-AB-C的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec978eb43bc4f9e7df83b0d0195dcda.png)
(1)求证:FD//平面ABE;
(2)求二面角E-AB-C的余弦值.
![](https://img.xkw.com/dksih/QBM/2011/3/16/1570041761062912/1570041766469632/STEM/6e362bb276d0470f87d8e775c4b360c3.png?resizew=306)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】如图,在边长为4的等边三角形
中,平行于
的直线分别交线段
于点
.将
沿着
折起至
,使得二面角
是直二面角.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/17f50144-b828-4c3c-888e-823b5ef2df0e.png?resizew=170)
(1)若平面
平面
,求证:
;
(2)若三棱锥
的体积为1,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3bacc06686947aeaf85e71b2e46aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e11ad0587f9c42941320be63f4b1ad7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/17f50144-b828-4c3c-888e-823b5ef2df0e.png?resizew=170)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8d2d20b2d2d56ec35cd5c6bbfbc4ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6097e56f0e6cb49dfea1b5ba6805c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbf6462666c8015e7de28e344af30b2.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7d8ebbebd9a58d2cce6e662a34b23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790f2ff63916dc8788b7c1fab39b4dde.png)
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