名校
解题方法
1 . 如图,四棱锥
中,底面
是矩形,PD垂直底面,E,F分别是棱PC,PA上的点,满足
已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ff716faec70fe58253a2ab85613551.png)
平面
;
(2)求直线
与平面
所成角的正弦值.
![](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/827178c2b37bd9bd69c386622697784f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ff716faec70fe58253a2ab85613551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
您最近一年使用:0次
名校
解题方法
2 . 已知在三棱锥
中,
,
为以AC为斜边的等腰直角三角形.
平面
;
(2)设
,存在该几何体外的一点D,使得
为等边三角形,平面BCD与平面ABC所成的锐二面角的正切值为
,求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd13eeeae4d887d11685c108e462920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,底面
为菱形,
,
底面
,
,
是
上任一点,
.
平面
.
(2)四棱锥
的体积为
,三棱锥
的体积为
,若
,求直线
与平面
所成角的正弦值.
![](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/c5426eb71ac190dc6d329e9630c87c83.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/ced3d3dd6af84fb052fc7281d707853e.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/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54cf75bbfc9db93d27937c8b8e977b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30cba3b587411c062716ecf980c088ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78420820ac0c2495d14c5371ccc61e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,在四棱锥
中,
平面
.
平面
;
(2)若点
为
的中点,线段
上是否存在点
,使得直线
与平面
所成角的正弦值为
.若存在,求
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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ada548ef6786fb15441d1b869e164f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ae8a3c30480b46d1cb81cf5745f2ae.png)
您最近一年使用:0次
5 . 如图,在四棱锥
中,已知
平面
,直线
与平面
所成的角是
,底面ABCD是菱形,
,
,点E,F分别为BC,PD的中点,Q是直线PC与平面AEF的交点.
(1)求证:平面
平面
;
(2)求三棱锥
体积.
![](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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5a86745bfe1dfe7bc2683811210330.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/5281aa14-9221-457a-bf72-4146cd11106e.png?resizew=155)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae319a163008e7f6ff71a7af9cf44382.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532218a1bbbe6ebe5e4f762eef9c692d.png)
您最近一年使用:0次
6 . 如图,四边形
为矩形,
≌
,且二面角
为直二面角.
平面
;
(2)设
是
的中点,
,二面角
的平面角的大小为
,当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f253eece04f2d23e3fdc338f694ffd5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2082c80ef7a33d9d397afccddeeca9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c9c2c831a0552a7c934365bc49ad3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6570aee18d73762e18716bb9dd33109b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
您最近一年使用:0次
2024-02-01更新
|
1012次组卷
|
3卷引用:湖南省株洲市第二中学2021-2022学年高二上学期第三次月考数学试卷
2024·全国·模拟预测
名校
解题方法
7 . 如图,在三棱锥
中,
和
都是正三角形,E是
的中点,点F满足
.
平面
;
(2)若
,且
平面
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374035f52d36b8444480f17bc36b658d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83e34aa8785a849b01e340868dfd490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d888c0b616792a2c41ff180de99fbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
2024-01-18更新
|
731次组卷
|
3卷引用:湖南师范大学附属中学(思沁校区)2023-2024学年高三下学期3月月考数学试题
名校
解题方法
8 . 如图,点
在以
为直径的圆
上,
垂直于圆
所在平面,
为
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/ec864f06-1260-4abc-b970-a6895125eda0.png?resizew=141)
(1)求证:平面
平面
;
(2)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/ec864f06-1260-4abc-b970-a6895125eda0.png?resizew=141)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a45fd0b63ff6f429b236ad8939cb22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4f142d753f5878ad14a8623d46cb46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519f4b4aacd80338261268fd9e6010e1.png)
您最近一年使用:0次
2024-01-10更新
|
975次组卷
|
4卷引用:湖南省长沙市第一中学2024届高三上学期月考数学试卷(五)
湖南省长沙市第一中学2024届高三上学期月考数学试卷(五)湖南省大联考长沙市一中2024届高三上学期月考数学试卷(五)广东省广州市中山大学附中2024届高三上学期第一次调研数学试题(已下线)专题06 立体几何 第一讲 立体几何中的证明问题(分层练)
名校
解题方法
9 . 如图,在四棱锥
中,
底面
,四边形
是直角梯形,
,
,点
在棱
上.
平面
;
(2)当
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.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/a7dd6f09284794d2c603823033940428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b523f9ea41acf2f5c5724a0824ae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8733eaae66410b00fd6a84294939b9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
您最近一年使用:0次
2024-01-11更新
|
2293次组卷
|
27卷引用:湖南省邵阳市邵东市第一中学2023-2024学年高二下学期第三次月考数学试题
湖南省邵阳市邵东市第一中学2023-2024学年高二下学期第三次月考数学试题福建省三明市将乐县第一中学2023-2024学年高二上学期第三次月考数学试题陕西省咸阳市高新一中2023-2024学年高二上学期第三次质量检测数学试卷广东省肇庆鼎湖中学2023-2024学年高二上学期12月月考数学试题(已下线)广东省深圳市深圳中学2024届高三一月阶段测试数学试题宁夏回族自治区银川市银川一中2024届高三上学期第六次月考数学(理)试题辽宁省新高考联盟(点石联考)2023-22024学年高二下学期3月阶段测试数学试题四川省绵阳市三台中学校2024届高三下学期第三学月(4月)月考理科数学试题广东省中山市中山纪念中学2023-2024学年高二下学期第二次月考数学试卷山东省滨州市2022-2023学年高二上学期期末数学试题四川省绵阳市江油市江油中学2022-2023学年高二下学期期末数学理科试题新疆阿勒泰地区2022-2023学年高二下学期期末考试数学试题北京市第五中学2022-2023学年高二下学期期末检测数学试题(已下线)1.4.2 用空间向量研究距离、夹角问题(AB分层训练)-【冲刺满分】2023-2024学年高二数学重难点突破+分层训练同步精讲练(人教A版2019选择性必修第一册)(已下线)第一章 空间向量与立体几何 章末重难点归纳总结-2023-2024学年高二数学《一隅三反》系列(人教A版2019选择性必修第一册)(已下线)第06讲 1.4.2用空间向量研究距离、夹角问题(2)山东省烟台市爱华高级中学2023-2024学年高二上学期期中考试数学试题陕西省宝鸡市千阳县中学2023-2024学年高二上学期期末复习基础训练数学试题辽宁省重点高中沈阳市郊联体2023-2024学年高二上学期1月期末考试数学试题河南省郑州市第十八中学2023-2024学年高二上学期期末模拟数学试题(二)四川省宜宾市屏山县2023-2024学年高二上学期期末数学试题(已下线)专题13 空间向量的应用10种常见考法归类(4)浙江省宁波市奉化区2023-2024学年高二上学期期末检测数学试题广东省茂名市电白区2023-2024学年高二上学期期末质量监测数学试题(已下线)6.3 空间向量的应用 (4)(已下线)专题05 空间向量与立体几何(解密讲义)(已下线)高二上学期期末考点大通关真题精选100题(1)
名校
解题方法
10 . 如图,在斜四棱柱
中,底面正方形
的中心是O,且
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/fa22c249-35a2-4d76-b3df-fb469d702ea3.png?resizew=201)
(1)证明:平面
平面
;
(2)若该四棱柱的所有棱长均为1,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/fa22c249-35a2-4d76-b3df-fb469d702ea3.png?resizew=201)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ef341642775978dbda10f32c525c2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
(2)若该四棱柱的所有棱长均为1,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85918d899b91e4914d55c31c89e8f708.png)
您最近一年使用:0次
2023-12-31更新
|
319次组卷
|
2卷引用:湖南省衡阳市第八中学等2024届高三上学期11月质量检测数学试题