2012·海南省直辖县级单位·一模
名校
1 . 已知四棱锥
中,底面
为矩形,且
,
,若
平面
,
,
分别是线段
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/d8b60aeb-9b84-4101-9159-91f1f5c79040.png?resizew=180)
(1)证明:
;
(2)在线段
上是否存在点
,使得
平面
?若存在,确定点
的位置:若不存在,说明理由;
(3)若
与平面
所成的角为45°,求二面角
的余弦值.
![](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/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/d8b60aeb-9b84-4101-9159-91f1f5c79040.png?resizew=180)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fcfedccc06e8537b1d681d1da2c1f3.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ba21765a4dc4988bd49a5b5a13f33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0901e2f5cefe6468cbbcaa332287d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d32c6f1f2d12161619aa3d15197ee5.png)
您最近一年使用:0次
2019-11-07更新
|
913次组卷
|
15卷引用:江西省南昌市洪都中学2019-2020学年高二上学期第三次联考理数试题
江西省南昌市洪都中学2019-2020学年高二上学期第三次联考理数试题(已下线)2011-2012学年安徽无为开城中学高二下学期期末考试理科数学试卷(已下线)2011-2012学年内蒙古呼伦贝尔市一中高二期末考试理科数学试卷(已下线)2013-2014学年浙江省台州中学高二下学期第一次统练理科数学试卷安徽省江淮名校2017-2018学年高二期中考试试题数学(理)湖南省邵阳市武冈第二中学2019-2020学年高二下学期期末数学试题沪教版(2020) 选修第一册 精准辅导 第3章 单元测试卷四川省成都市锦江区嘉祥外国语高级中学2022-2023学年高二上学期入学考试数学试题(已下线)2012届海南省琼海市高考模拟测试理科数学试卷(已下线)2012届山东省高考模拟预测卷(三)理科数学试卷(已下线)2012届山东省鄄城一中高三下学期模拟冲刺考试理科数学试卷(已下线)2014届山东省日照一中高三上学期12月月考理数学试卷(已下线)2015届云南省玉溪一中高三上学期第一次月考理科数学试卷河南省中原名校(即豫南九校)2017-2018学年高一上学期第二次联考数学试题甘肃省武威第十八中学人教A版数学选修2-1单元检测:第三章 空间向量与立体几何
名校
2 . 在四棱锥
中,底面是边长为2的菱形,
,
,
,
,
为
的中点.
(1)证明:
;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea853350b43e0e4dcde21d821f5fbcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37002ada5d194d4d062fa3285d7d9824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9829fc6685b59fdc609f32f30ebd9e6d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334b0be972ebf5a46333c0c4369aa90a.png)
您最近一年使用:0次
2018-02-11更新
|
419次组卷
|
2卷引用:江西省南昌市第十九中学2022-2023学年高二上学期期末考试数学试卷
名校
3 . 将两块三角板按图甲方式拼好,其中
,
,
,
,现将三角板
沿
折起,使
在平面
上的射影
恰好在
上,如图乙.
(2)求证:
为线段
中点;
(3)求二面角
的大小的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab5c45a72849d2cae1d65b282b5bd19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)求证:;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
您最近一年使用:0次
2018-02-06更新
|
340次组卷
|
2卷引用:江西省赣州市宁都县宁师中学2019-2020学年高二上学期12月月考数学(理)试题
4 . 如图4,正三棱柱
中,各棱长都相等,则二面角
的平面角的正切值为
![](https://img.xkw.com/dksih/QBM/2017/12/9/1834936227119104/1836404180066304/STEM/d01c0ce36f7549ad844e02ab313e7b52.png?resizew=132)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2082d95169c4ca662bead442440c9e.png)
![](https://img.xkw.com/dksih/QBM/2017/12/9/1834936227119104/1836404180066304/STEM/d01c0ce36f7549ad844e02ab313e7b52.png?resizew=132)
A.![]() | B.![]() | C.1 | D.![]() |
您最近一年使用:0次
2017-12-11更新
|
2910次组卷
|
8卷引用:江西省南昌县莲塘县第三中学2019-2020学年高二下学期期末考试数学(理)试题
名校
5 . 如图,直三棱柱
中,
,
,
是棱
上的动点.
(1)证明:
;
(2)若平面
分该棱柱为体积相等的两个部分,试确定点
的位置,并求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512cc5f78111d4592f6d843db6915f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896d66e2af642634094aec5187f29a21.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e0254c84e44728749b34c08c28ab1e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/a67addaa-0f90-4b73-ac71-a465065696be.png?resizew=146)
您最近一年使用:0次
6 . 在四棱柱
中,底面ABCD是菱形,且
.
(1)求证:平面
平面
;
(2)若
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28af669cd49a1a5fc854e9d2495a5fa6.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0fbd88fdb064072eedd136e9cb41ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc1c04946340198af69170d4ebd4b42.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8510133b8aca1b63b25a86ee39d5bf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2fe763308ef7daaaf5fb8b768450ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/31dd9dbd-74b1-4534-ac33-be585a647631.png?resizew=215)
您最近一年使用:0次
2016-12-04更新
|
818次组卷
|
2卷引用:江西省吉安市青原区井冈山大学附属中学2022-2023学年高二上学期期末考试数学试题
7 . 如图,三棱柱
中,侧棱
平面
,
为等腰直角三角形,
,且
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/6/5fa4f207-e09d-4574-b170-031170af723a.png?resizew=188)
(1)求证:
平面
;
(2)求锐二面角
的余弦值;
(3)若点
是
上一点,求
的最小值.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c72b3629f97ff90ca20d40ff93e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1857eadd6b23a87a1a5b4ffff584efd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/6/5fa4f207-e09d-4574-b170-031170af723a.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a76f52ae3ef071a5084d09ec035c80c.png)
(2)求锐二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d061bf4e0c0fc7dbae8f13d1d603de.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9b54f882b342b056924785464fa79e.png)
您最近一年使用:0次
11-12高二·江西九江·阶段练习
8 . 如图,在三棱台
中,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/2c2000c9-bef0-4f9f-b160-84cd08b972ff.png?resizew=191)
(Ⅰ)求证:
平面
;
(Ⅱ)若
平面
,
,
,求平面
与平面
所成角(锐角)的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8783bc74553bf44b61d999a0e4144bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feeb1d761e66157e36a45040ebdce653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/2c2000c9-bef0-4f9f-b160-84cd08b972ff.png?resizew=191)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debdc6632a4877e5131d3da25cda8b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828e73ec5e00f95aa11ff74c703a5c1.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1333b03f13c3c738a8308d80ceca62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73152c2b4298298c8b81dc16dc21f5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828e73ec5e00f95aa11ff74c703a5c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61510c34c5795d7261569b4d09098271.png)
您最近一年使用:0次
2016-12-03更新
|
4513次组卷
|
20卷引用:2011-2012学年江西省九江一中高二第二次月考理科数学
(已下线)2011-2012学年江西省九江一中高二第二次月考理科数学2016届江西省临川区一中高三上学期第一次月考理科数学试卷辽宁省沈阳市法库县高级中学2020-2021学年高二上学期10月月考数学试题(已下线)【新东方】【2020】【高二上】【期中】【HD-LP362】【数学】(已下线)专练12 空间向量与立体几何综合检测卷(B卷)-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)2023版 湘教版(2019) 选修第二册 过关斩将 第2章 本章复习提升云南省保山市腾冲市第八中学2023-2024学年高二下学期开学考试数学试题(已下线)2012届安徽省六安市舒城一中高三第四次月考理科数学2015年全国普通高等学校招生统一考试理科数学(山东卷)2014-2015学年河北省正定中学高一下学期期末考试数学试卷广东省德庆县香山中学2018届高三理科数学第一次模拟试题苏教版高中数学 高三二轮 专题23 立体几何中的向量方法及抛物线 测试(已下线)5.2 直线 平面平行与垂直的判定与性质[理]-《备战2020年高考精选考点专项突破题集》湖北省重点高中联考协作体2018-2019学年高三下学期期中数学(理)试题2020届山东省青岛天龙中学高三第一次模拟考试数学试题(已下线)【新东方】杭州新东方高中数学试卷359陕西省汉中市2022届高三下学期教学质量第二次检测考试理科数学试题2023届甘肃省高考数学模拟试卷(一)(已下线)专题24 空间向量与空间角的计算-十年(2011-2020)高考真题数学分项(已下线)专题23 立体几何解答题(理科)-2
名校
9 . 如图,
是正方体
中
上的动点,下列命题:
![](https://img.xkw.com/dksih/QBM/2015/1/5/1571948032401408/1571948037816320/STEM/0a895589-e443-4a54-83fe-e6a30aa3808e.png)
①
;
②
与
所成的角是60°;
③
为定值;
④
平面
;
⑤二面角
的平面角为45°.
其中正确命题的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/2015/1/5/1571948032401408/1571948037816320/STEM/0a895589-e443-4a54-83fe-e6a30aa3808e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0dba7306bdaf6e1011c146dea29172.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd45dddd8918da711e493dc6010ce37b.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b668b5c01e0b1a529cc4e3efb2e9057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fefd8229243bcbee5ac197740e6c66ab.png)
⑤二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
其中正确命题的个数有( )
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
2016-12-03更新
|
1431次组卷
|
3卷引用:2014-2015学年江西省赣州市十二县高二上学期期中联考理科数学试卷
2014-2015学年江西省赣州市十二县高二上学期期中联考理科数学试卷江西省赣州市赣县第三中学2020-2021学年高二8月入学考试数学试题(已下线)第二章 立体几何中的计算 专题六 空间定值问题 微点6 空间定值问题综合训练【培优版】
名校
10 . 如图,在三棱柱
中,已知
侧面
,
,
平面
;
(2)
是线段
上的动点,当平面
平面
时,求线段
的长;
(3)若
为
的中点,求二面角
平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73447cc7448ba0fca6baceca1dd14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ad7c180d6d084ecb25f23cb6fe9b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ba598309f6ec173e2688ac07eaccf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46063cbdc5f15455de4728fac3e1228e.png)
您最近一年使用:0次
2016-12-03更新
|
1068次组卷
|
3卷引用:2014-2015学年江西省赣州市十二县高二上学期期中联考理科数学试卷