名校
1 . 已知四棱锥
中,底面
为菱形,点E为校PC上一点(与P、C不重合),点M、N分别在棱PD、PB上,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960912373121024/2968004299522048/STEM/782e368afb0548e7bcb0517f95a8e8d4.png?resizew=245)
(1)求证:
平面
;
(2)若
为
中点,
,
,
,求二面角
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/b997c9c4f053b99b47d0307cdf42516a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960912373121024/2968004299522048/STEM/782e368afb0548e7bcb0517f95a8e8d4.png?resizew=245)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3c0430146b7b8d40ebb721a4d0de19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
(2)若
![](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/b17e228085eaa3c91d68620582ab6b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45884ed34b6a258ee31c137f13b01610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4125524caac016727c80d2722c5ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a367662d767d6fe559a55159ff24d855.png)
您最近一年使用:0次
2022-04-28更新
|
700次组卷
|
3卷引用:甘肃省兰州市2022届高三诊断考试理科数学试题
甘肃省兰州市2022届高三诊断考试理科数学试题(已下线)考点17 点、直线、平面之间的位置关系-2-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)江西省贵溪市实验中学2024届高三上学期11月第二次模拟检测数学试题
名校
2 . 如图,在多面体ABCDEF中,四边形ABCD为直角梯形,
,AB⊥AD,四边形ADEF为正方形,平面ADEF⊥平面ABCD.BC=3AB=3AD,M为线段BD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/e27ee0cd-1c32-4e61-82e3-d56b0f8dfcd6.png?resizew=273)
(1)求证:BD⊥平面AFM;
(2)求平面AFM与平面ACE所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/e27ee0cd-1c32-4e61-82e3-d56b0f8dfcd6.png?resizew=273)
(1)求证:BD⊥平面AFM;
(2)求平面AFM与平面ACE所成的锐二面角的余弦值.
您最近一年使用:0次
2023-01-15更新
|
479次组卷
|
4卷引用:甘肃省兰州市第五十中学2022-2023学年高三第一次模拟考试数学(理科)试题
名校
3 . 在如图所示的多面体中,点
在矩形
的同侧,直线
平面
,平面
平面
,且
为等边三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/78fb6e26-f2a4-4548-8bb7-2c4ce6bf1684.png?resizew=144)
(1)证明:
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.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/dd2d28f1e7a6b17401c19c34beddcbe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3521fa4923fb2e492e0b9d8c080215a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/78fb6e26-f2a4-4548-8bb7-2c4ce6bf1684.png?resizew=144)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384ffba86ff08ce9e783d5d1bc51686.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f636f76d550dfb593a25eb680cff556.png)
您最近一年使用:0次
2022-02-25更新
|
1390次组卷
|
4卷引用:甘肃省兰州市第五十中学2022-2023学年高三下学期开学摸底考试数学(理科)试题
名校
解题方法
4 . 如图,在四棱锥
中,底面
是菱形,
平面
,
,
,
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/9/5/2801459760177152/2802118573514752/STEM/60f060483da04840b3200d1b002325f5.png?resizew=211)
(1)求证:平面
平面
;
(2)求平面
与平面
的夹角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/9/5/2801459760177152/2802118573514752/STEM/60f060483da04840b3200d1b002325f5.png?resizew=211)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2021-09-06更新
|
676次组卷
|
3卷引用:甘肃省兰州市第一中学2021-2022学年高三上学期11月防疫居家阶段检测数学(理科)试题
名校
5 . 如图,在三棱锥
中,
平面ABC,
,
,点E,F分别是AB,AD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/2e6cb80f-9086-4252-8a3a-cb421a0c9610.png?resizew=276)
(1)求证:
平面BCD;
(2)设
,求直线AD与平面CEF所成角的正弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff7bd82b90112fa0f8383b069564b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/2e6cb80f-9086-4252-8a3a-cb421a0c9610.png?resizew=276)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927729940a1598d48e1b6ebc1c2f78ec.png)
您最近一年使用:0次
2021-08-17更新
|
2291次组卷
|
12卷引用:甘肃省兰州市第一中学2021-2022学年高三上学期第一次月考(10月)数学(理)试题
甘肃省兰州市第一中学2021-2022学年高三上学期第一次月考(10月)数学(理)试题陕西省渭南市富平县2021届高三下学期二模理科数学试题陕西省部分名校2021-2022学年高三上学期10月月考理科数学试题(已下线)专题19 空间向量与立体几何(解答题)-备战2022年高考数学(理)母题题源解密(全国甲卷)陕西省榆林市神木中学2021届高三下学期适应性考试理科数学试题湖北省黄石市大冶市第一中学2021-2022学年高二上学期10月月考数学试题陕西省汉中市校际联考2020-2021学年高二下学期期末理科数学试题广东省汕头市潮阳区棉城中学2021-2022学年高二上学期期中数学试题第一章 空间向量与立体几何单元测试(巅峰版)辽宁省大连部分重点高中2022-2023学年高二上学期10月月考数学试卷江苏省南通市通州区石港中学2022-2023学年高二下学期第三次阶段检测数学试题安徽省合肥一六八中学2021-2022学年高二上学期第一次月考数学试题
6 . 在三棱锥
中,
是
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f45c8074-1bed-400e-bfcd-189e8fa8fe86.png?resizew=156)
(1)证明:
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9978986377aae709a9da012e2782e9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f45c8074-1bed-400e-bfcd-189e8fa8fe86.png?resizew=156)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f54161deed9fb6fa94318cd5a2efd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4294b7141d394654841008ac9b40dab.png)
您最近一年使用:0次
名校
7 . 如图,已知四棱锥
,
是等边三角形,
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f1836a27-7e3a-4c92-9a07-b686f67a093d.png?resizew=152)
(1)求证: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/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ae5f8381ffcce4281a0ca817b82a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f1836a27-7e3a-4c92-9a07-b686f67a093d.png?resizew=152)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2021-03-28更新
|
479次组卷
|
3卷引用:甘肃省兰州市永登县第一中学2020-2021学年高三上学期期末数学试题
名校
8 . 如图,已知三棱柱
中,平面
平面ABC,
,
.
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502377418481664/2504067813048320/STEM/87d920da95854bd1a8341b8cc0f194ce.png?resizew=178)
(1)证明:
;
(2)设
,
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fe926770d2354e172dec02f5ce2efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502377418481664/2504067813048320/STEM/87d920da95854bd1a8341b8cc0f194ce.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47af45fbf1714055d9b414a44a8613fa.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8c563906d6d25078fd5d96abe96194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e718d2042232538370f5168f7eb9a1.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,三棱锥
中,
,A、D分别为
、
的中点,
,
,平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/af55e85b-d761-4190-b242-56d09d00b896.png?resizew=153)
(1)证明:
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84160ab4c7e760ae3a09d1cce623a49d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef95ebb3e3e81f72c609203f0a046a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e04cc7a52c3ad292d937bfa4507343e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d502002ad65d8bc45f71693fb79256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f464948420e7b666335bfd60f7678e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/af55e85b-d761-4190-b242-56d09d00b896.png?resizew=153)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71b7cbc7958bc5a520aad74842e59e8.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3336e307c79e059770bf1a46d2974df7.png)
您最近一年使用:0次
名校
10 . 如图,在三棱柱
中,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/1086a6ac-8473-4a59-a0a7-82ab95af2f97.png?resizew=164)
(1)证明:
平面ABC.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518a322494bd7624e6eed7fe290a2f9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/1086a6ac-8473-4a59-a0a7-82ab95af2f97.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a824c242050a27d9da3bb3276ea99170.png)
您最近一年使用:0次
2020-07-11更新
|
430次组卷
|
4卷引用:甘肃省兰州外国语高级中学2021-2022学年高三上学期第一次适应性考试数学(理科)试题