12-13高三上·吉林·期末
解题方法
1 . 如图,在四棱锥
中,侧棱
底面
,底面
为矩形,
,
为
的上一点,且
,
为PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/5cfc3874-e2f3-4103-afab-2a3830946691.png?resizew=257)
(Ⅰ)求证:
平面AEC;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cc37d06ffb13f65c0db2f21aafa363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcbbbe350b38381d1999e2886d45f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/5cfc3874-e2f3-4103-afab-2a3830946691.png?resizew=257)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
您最近一年使用:0次
名校
解题方法
2 . 在四边形
中,对角线
垂直相交于点
,且
,
,将
沿
折到
的位置,使得二面角
的大小为
(如图).已知
为
的中点,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/2017/2/5/1619482869964800/1619482870497280/STEM/5e83407c40744d66b71f29d7cc0469e4.png?resizew=261)
(1)证明:直线
平面
;
(2)求直线
与平面
所成角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4aebdb63315adac0365d3a61a15f67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef520a2657abdf14fa6818c380b596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbad473c16df3ff62c1c6b37de6aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4be6ee295b46490a1eed671b6975a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25c7ffb5540e9527451e19e477aafd7.png)
![](https://img.xkw.com/dksih/QBM/2017/2/5/1619482869964800/1619482870497280/STEM/5e83407c40744d66b71f29d7cc0469e4.png?resizew=261)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9abe6e8d1f4f1e8bdc46ddbae0cd789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2017-02-08更新
|
726次组卷
|
3卷引用:吉林省吉林大学附属中学2017届高三第五次摸底考试数学(理)试题
名校
解题方法
3 . 如图,四棱锥P—ABCD中,底面ABCD是矩形,PA⊥底面ABCD,PA=AB=1,AD=
,点F是PB的中点,点E在边BC上移动.
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016397500416/1572016403480576/STEM/a36789d7be2a4e548f20aa14958390cb.png)
(Ⅰ)证明:无论点E在边BC的何处,都有PE⊥AF;
(Ⅱ)当BE为何值时,PA与平面PDE所成角的大小是45°?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016397500416/1572016403480576/STEM/a36789d7be2a4e548f20aa14958390cb.png)
(Ⅰ)证明:无论点E在边BC的何处,都有PE⊥AF;
(Ⅱ)当BE为何值时,PA与平面PDE所成角的大小是45°?
您最近一年使用:0次
2016-12-03更新
|
347次组卷
|
2卷引用:2015届吉林省实验中学高三上学期第三次模拟考试理科数学试卷
2012·吉林延边·一模
4 . 如图所示,已知
是正方形,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2012/2/20/1570751657574400/1570751662899200/STEM/6826bb566add4983bc5b580fa3696f03.png?resizew=171)
(1)求异面直线
与
所成的角;
(2)在线段
上是否存在一点
,使
平面
?若存在,确定
点的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://img.xkw.com/dksih/QBM/2012/2/20/1570751657574400/1570751662899200/STEM/6826bb566add4983bc5b580fa3696f03.png?resizew=171)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
12-13高二上·吉林·期末
5 . 如图:已知三棱锥
中,
面
,
,
,
为
上一点,
,
分别为
的中点.
(1)证明:
.
(2)求面
与面
所成的锐二面角的余弦值.
(3)在线段
(包括端点)上是否存在一点
,使
平面
?若存在,确定
的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d0864e6622e150f1016a76952b2889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6813b47d087578bf054bcf56b64b42a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364e6d15fe646947fdd3f622e36612dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108814a3d763c02025ec48c0a68903a5.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ea7dcb6e94618da188f06a68a3306d.png)
(2)求面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e278d2d46204a1a290ce5fb9ab5766fb.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec2dbe15ecb99b2b655076ae75ea790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/2012/3/12/1570797626007552/1570797631651840/STEM/8b4a6605563748b8b6295114e5ed1f04.png?resizew=200)
您最近一年使用:0次
12-13高二上·吉林·期末
解题方法
6 . 如图,三棱柱
中,
平面
,
,
,
,
,
为
的中点,
为
的中点,
![](https://img.xkw.com/dksih/QBM/2012/2/9/1570725997928448/1570726003499008/STEM/086008e7-3d80-4c65-ae4a-c9d964f2add8.png?resizew=162)
(1)求直线
与
所成的角的余弦值;
(2)在线段
上是否存在点
,使
平面
,若存在,求出
;若不存在,说明理由.
![](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/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/973111faadd18d09a51945f9689d6992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ef823c96fb5567f1859977aba97c7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/2012/2/9/1570725997928448/1570726003499008/STEM/086008e7-3d80-4c65-ae4a-c9d964f2add8.png?resizew=162)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b237ef19a4f4d26c3e32957574f149a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
11-12高三·吉林·阶段练习
解题方法
7 . 如图所示,已知
是正方形,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2012/2/15/1570738048483328/1570738054053888/STEM/e0699f80-5989-4675-a85a-e42fa60ff8fd.png?resizew=196)
(1)求异面直线
与
所成的角;
(2)在线段
上是否存在一点
,使
平面
?若存在,确定
点的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://img.xkw.com/dksih/QBM/2012/2/15/1570738048483328/1570738054053888/STEM/e0699f80-5989-4675-a85a-e42fa60ff8fd.png?resizew=196)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
8 . 如图,在三棱锥
中,
底面
,且
,
,
,
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/310e95f6-4444-419a-acc3-0a7fdd6c6c44.png?resizew=163)
(1)求证:平面
平面
;
(2)求二面角
的平面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e33a849c6276adc188d414b048665f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f19185a112972b6e6d8b128e49bfdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022365ed188bd800e0b8a2b4ec1e2303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9723a6e093c297b001436e8932b1820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/310e95f6-4444-419a-acc3-0a7fdd6c6c44.png?resizew=163)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68bd91703720951780be6110c83860c.png)
您最近一年使用:0次
2016-12-03更新
|
913次组卷
|
4卷引用:吉林省长春市九台区第四中学2019-2020学年高二上学期期末考试数学(理科)试题
吉林省长春市九台区第四中学2019-2020学年高二上学期期末考试数学(理科)试题2016届辽宁省五校协作体高三上学期期初考试理科数学试卷天津市和平区2016-2017学年高二下学期期末质量调查数学(理)试题(已下线)模块六 立体几何 大招17 判二面角的锐钝问题