1 . 已知如图,在四棱锥
中,底面
为正方形,
,
平面
,
为
上一点,且
.
平面
;
(2)求二面角
的平面角的余弦值.
![](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/96127e45e2dd2494fccb1c0905951f0b.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b384315ba84cafb978ef3619c8162b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c66edca50eace2fad71ef59d73c662.png)
您最近一年使用:0次
2021-05-19更新
|
306次组卷
|
5卷引用:新疆维吾尔自治区乌鲁木齐市第三十一中学2023届高三下学期4月月考理科数学试题
新疆维吾尔自治区乌鲁木齐市第三十一中学2023届高三下学期4月月考理科数学试题陕西省2021届高三下学期教学质量检测测评(五)理科数学试题(已下线)“超级全能生”2021届高三全国卷地区5月联考试题(乙卷)数学(理)试题(已下线)“超级全能生”2021届高三全国卷地区5月联考试题(甲卷)数学(理)试题海南省2021-2022学年高二下学期学业水平期中考试数学试题
名校
解题方法
2 . 在三棱柱ABC﹣A1B1C1中,AA1
底面ABC,
为正三角形,AB=AA1=2,E是BB1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/5230e9ec-a061-4cc9-9cb8-88e4d36e2841.png?resizew=133)
(1)求证:平面AEC1
平面AA1C1C;
(2)求二面角B﹣AC1﹣E的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/5230e9ec-a061-4cc9-9cb8-88e4d36e2841.png?resizew=133)
(1)求证:平面AEC1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(2)求二面角B﹣AC1﹣E的余弦值.
您最近一年使用:0次
2021-07-08更新
|
1319次组卷
|
4卷引用:新疆师范大学附属中学2022届高三9月月考数学(理)试题
新疆师范大学附属中学2022届高三9月月考数学(理)试题湖北省2021届高三5月份高考数学联考试题(已下线)专题04 立体几何-备战2022年高考数学母题题源解密(新高考版)(已下线)专题10 导数及其应用-备战2022年高考数学母题题源解密(新高考版)
解题方法
3 . 如图所示,几何体
中,四边形
为菱形,
平面
,
,
,
,
,平面
与平面
的交线为
.
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708171990654976/2737005455712256/STEM/c4aec4347ce5458eb5d903c4605676fe.png?resizew=166)
(1)证明:直线
平面
;
(2)求直线
与平面
所成角的正弦值的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20e38a1b5cfffd43a3405481a1d67cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a38e6c6dfde2b19b6b47f35a439a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd872477ec741e11cc7081b4dc49c30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8471ec74d2441fa682b204e48217e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d48852ad433b0da21abf5be0f79260d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dc8826770249f3996b8a188c03da92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708171990654976/2737005455712256/STEM/c4aec4347ce5458eb5d903c4605676fe.png?resizew=166)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9df740160690029ac1e730c85f20347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
2021-06-06更新
|
643次组卷
|
3卷引用:新疆生产建设兵团第六师五家渠高级中学2023届高三下学期2月月考数学(理)试题
新疆生产建设兵团第六师五家渠高级中学2023届高三下学期2月月考数学(理)试题四川省天府名校2021届高三下学期4月诊断性考试 数学(理) 试题(已下线)专题03 直线与平面所成角(含探索性问题)-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)
4 . 如图是矩形
和边
为直径的半圆组成的平面图形,将此图形沿
折叠,使平面
垂直于半圆所在的平面,若点
是折后图形中半圆
上异于
的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/9b91e89c-ebd2-4665-9065-d16b67d27304.png?resizew=311)
(1)证明:
;
(2)若
,且异面直线
和
所成的角为
,求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/9b91e89c-ebd2-4665-9065-d16b67d27304.png?resizew=311)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad2dc5dea4563dfd9afefeb8b210eeb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4a6b8ef3e79b4482388c3391d8b18.png)
您最近一年使用:0次
2021-07-12更新
|
256次组卷
|
2卷引用:新疆维乌鲁木齐市第四十中学2023届高三下学期3月月考理科数学试题
名校
解题方法
5 . 如图,在四棱锥
中,
,且
.
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714555544813568/2716885785305088/STEM/84f4a1d0-e01c-4584-9b1e-31e53494c54a.png?resizew=252)
(1)证明:
;
(2)已知
,
,
.在棱
上是否存在一点
,使得平面
与平面
所成的锐二面角的余弦值为
?若存在,求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d0c2a55d368a0447e0ca8c2a296c28.png)
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714555544813568/2716885785305088/STEM/84f4a1d0-e01c-4584-9b1e-31e53494c54a.png?resizew=252)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96d8b87b09e3ca52d91b3f24365f251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c6b0a6cb307c4c02f503831862f7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d8537bfc5cf701c841636d24aef5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd4af2c49cfde809f4bdae31f946a4a.png)
您最近一年使用:0次
2021-05-08更新
|
643次组卷
|
2卷引用:新疆乌鲁木齐市第八中学2021-2022学年高二上学期第三次月考数学(理)试题
名校
解题方法
6 . 如图,四棱锥
中,
底面
,E为棱
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/40719fde-1d5a-47e3-b63f-bac956961291.png?resizew=136)
(1)证明:平面
平面
;
(2)求
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d7eef3156c9fc9fb107c13d7c7d139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82a8bc0e66fd0bd01a8f0c807be31a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/40719fde-1d5a-47e3-b63f-bac956961291.png?resizew=136)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cc2b3a37ddb402589bd04351247a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ffe968b09340adfdb8372728b25a22.png)
您最近一年使用:0次
2021-03-24更新
|
401次组卷
|
3卷引用:新疆乌鲁木齐市第八中学2018-2019学年高二下学期第三次月考数学(文)试题
名校
解题方法
7 . 如图,在直三棱柱
中,
,
,
,
分别是
和
上动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/d1679b91-1efc-453a-9e15-3702d560a63b.png?resizew=144)
(1)求证:
;
(2)若
,求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8f940b796af67206b3f9dd410a407.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/d1679b91-1efc-453a-9e15-3702d560a63b.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c75464d4192176556f86d01fe20c9e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b27af7868ae7bfc55d597d44f8bfe30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be1faf8713ce4d71f82f086ca4712c3.png)
您最近一年使用:0次
2020-05-13更新
|
238次组卷
|
4卷引用:新疆乌鲁木齐2019-2020学年高三年级第二次诊断性测试理科数学试题
名校
解题方法
8 . 已知抛物线
,过抛物线
的焦点
且垂直于
轴的直线交抛物线
于
两点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/040b01b6-ddbd-47b0-8b75-dd0b63de8f6c.png?resizew=217)
(1)求抛物线
的方程,并求其焦点
的坐标和准线
的方程;
(2)过抛物线
的焦点
的直线与抛物线
交于不同的两点
,直线
与准线
交于点
.连接
,过点
作
的垂线与准线
交于点
.求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4963d116d232acb4f69e86455cdf81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/040b01b6-ddbd-47b0-8b75-dd0b63de8f6c.png?resizew=217)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)过抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f63cb94c9410ab740f8dd236db07c3.png)
您最近一年使用:0次
2020-05-12更新
|
896次组卷
|
5卷引用:新疆维吾尔自治区塔城地区塔城地区第二中学2022-2023学年高三上学期11月月考数学文科试题
解题方法
9 . 如图,在多面体ABCDEF中,底面ABCD是正方形,梯形
底面ABCD,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/11b18a49-5743-43c4-817e-8c471459679c.png?resizew=167)
(Ⅰ)证明:平面
平面
;
(Ⅱ)求直线AF与平面CDE所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3e598620671950ba89b85ab0c73b32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/11b18a49-5743-43c4-817e-8c471459679c.png?resizew=167)
(Ⅰ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf84ed033bd035c2fe7552badd5e447d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14eec658f69c267a70c1e8f9b744e282.png)
(Ⅱ)求直线AF与平面CDE所成角的大小.
您最近一年使用:0次
2020-04-23更新
|
251次组卷
|
2卷引用:新疆维吾尔自治区2019-2020学年高三适应性检测理科数学(问卷)试题
解题方法
10 . 如图,在四棱锥
中,四边形
为梯形,且AB
DC,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/4e9f54d7-9df7-4c57-b74a-04b4a8aad691.png?resizew=209)
(Ⅰ)证明:平面
平面
;
(Ⅱ)若
,
,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/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/4e9f54d7-9df7-4c57-b74a-04b4a8aad691.png?resizew=209)
(Ⅰ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f04579e4c69a5b6b895e0c44a94532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83c3f76bc7569c3c088da98bb3b2c50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
2020-05-09更新
|
280次组卷
|
2卷引用:2020届新疆高三第一次模拟测试(问卷)数学(理科)试题