如图,在三棱柱
中,
,
.
(1)证明:
;
(2)若
,
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb36baa03b28d2ddb4bafa0cd094d9f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/da5a4dfe-ad56-4de0-9008-b35af5a88915.png?resizew=159)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943b0dc0ce6e62cb6985d15e5c8baa5b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4639a9dc0bc99101cbde59fef04b4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a677b42f8b427b21924a559b90141d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aedf65d7d930fdb972d4802c0dea8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cbb74984939d59964559c3560ef7ba.png)
2023·贵州黔东南·模拟预测 查看更多[4]
贵州省凯里市第一中学2023届高三下学期高考模拟(黄金Ⅰ卷)理科数学试题(已下线)专题10 立体几何综合-2宁夏吴忠市吴忠中学2024届高三上学期开学第一次月考数学(理)试题(已下线)专题06 用空间向量研究距离、夹角问题10种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
更新时间:2023-07-20 17:07:39
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,四棱台
中,
底面
,平面
平面
为
的中点.
(1)证明:
;
(2)若
,且
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0424446817f60c18f8e4e3cc202ad99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecf072589c0f901d92f6bda111d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a2464689f8923508692e990d6e66ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df00cdf77ed39ca5a0b305861a693142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0ca16c346f7d035fa9dd7d34e021d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd4dbebae4f4da656efb6c959fb6a2d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79d71904b5b55d904eac3220651fc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e746bce74c14b20d09f924f2c0446774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36763e1ba181dde22e3f825d5cfdbaf7.png)
![](https://img.xkw.com/dksih/QBM/2018/4/11/1921551988072448/1922043088527360/STEM/9c85dab3750945fe94db108fb4940d85.png?resizew=155)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在四棱锥P﹣ABCD中,底面ABCD是边长为1的正方形,PB⊥BC,PD⊥DC,且PC
.
![](https://img.xkw.com/dksih/QBM/2020/1/7/2372104037834752/2372556444737536/STEM/52ab1d07f1e24a7f871d2103b1391cf8.png?resizew=260)
(1)求证:PA⊥平面ABCD;
(2)求异面直线AC与PD所成角的余弦值;
(3)求二面角B﹣PD﹣C的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada26e9b7fe22be819d675f72e086ee.png)
![](https://img.xkw.com/dksih/QBM/2020/1/7/2372104037834752/2372556444737536/STEM/52ab1d07f1e24a7f871d2103b1391cf8.png?resizew=260)
(1)求证:PA⊥平面ABCD;
(2)求异面直线AC与PD所成角的余弦值;
(3)求二面角B﹣PD﹣C的余弦值.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图所示,三角形
所在的平面与矩形
所在的平面垂直,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e8a523f2-610d-4b6d-a113-02ec4f5f8c08.png?resizew=211)
(1)证明:
平面
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c8a72acdef14452a6c62f2a60a15fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e8a523f2-610d-4b6d-a113-02ec4f5f8c08.png?resizew=211)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564376a88fa74090de9f7694226a6184.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90197a948331e61db644266368017e3.png)
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适中
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名校
解题方法
【推荐2】如图,已知四棱锥
,底面
是菱形,
平面
,
,
是
边的中点,
是
边上的中点,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/4cd65fa0-737e-4bd2-b0a4-757591a22b1a.png?resizew=200)
(1)求证:
;
(2)求证:
平面
.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/4cd65fa0-737e-4bd2-b0a4-757591a22b1a.png?resizew=200)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304e9d63e7fdc531f4f7b805b765a1b1.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在直三棱柱
中,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2018/10/26/2061797583347712/2066059204788224/STEM/d65677146b4a4fb7a87e30e5a37069e5.png?resizew=231)
(1)求证:
平面
;
(2)若
,
,
,求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2018/10/26/2061797583347712/2066059204788224/STEM/d65677146b4a4fb7a87e30e5a37069e5.png?resizew=231)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e367b683581c7cbe018078168f69efc5.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在矩形
中,
,点
是
的中点.将
沿
折起,使得点
到达点
的位置,且使平面
平面
.
![](https://img.xkw.com/dksih/QBM/2020/7/22/2511303048527872/2511948913696768/STEM/4702ce6c86ce4cd28eb0816ee3252837.png?resizew=227)
(1)求证:平面
平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://img.xkw.com/dksih/QBM/2020/7/22/2511303048527872/2511948913696768/STEM/4702ce6c86ce4cd28eb0816ee3252837.png?resizew=227)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a26a7784c7419d8359fb119c8ecc03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b489c25405ce48699d4f0a62820bed.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】在如图所示的几何体中,
平面
,四边形
为正方形,
为等腰直角三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/f92faf3b-c40f-49ab-a465-afaadebb1ca6.png?resizew=123)
(1)求证:
;
(2)若
与
交于点
, 求锐二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/f92faf3b-c40f-49ab-a465-afaadebb1ca6.png?resizew=123)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c182a9d9fd0a7023b710cd671d9468e7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432b602bbaf82a4a40091ecfc8a8ffb0.png)
您最近一年使用:0次