1 . 如图,在四棱锥
中,底面ABCD为直角梯形,
,
,
,点
为
的中点,
,
.
平面ABCD;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1161e0345b3646c71365430dccbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f03adc5011c86ae38d39246a7e9d0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d30637da200a07672ae231b4c5c09cd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010a32eb621302fe4a397f7a667d5071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2624b3be2a7e4123747b6f312bcc63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753a64115d3ba7e6bb835b63e39fbdd3.png)
您最近一年使用:0次
2024-03-21更新
|
477次组卷
|
2卷引用:四川省成都市蓉城名校联盟2023-2024学年高二下学期开学考试数学试题
解题方法
2 . 如图,在长方体
中,
,
,动点M在体对角线
(含端点)上,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f5dd01b683fcab010fc6ff5558c9e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
A.当点M为![]() ![]() |
B.当点M为![]() ![]() ![]() |
C.存在点M,使得![]() ![]() |
D.直线BM与平面![]() ![]() |
您最近一年使用:0次
3 . 如图,在四棱锥中,底面
为菱形,
是边长为2的正三角形,
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60334b062acf697efaa4f3f7087a80dc.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c7a937699f989b685f285041434000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
名校
4 . 如图,已知梯形
与
所在平面垂直,
,
,
,
,
,
,
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/8bbbf02d-111d-4c33-a550-ada823242705.png?resizew=155)
(1)若
为
边上一点,
,求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbb52f9b226b1db3f6f9f055948bd38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c250ece82bf79a8b99af177f7548c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09676c143a6ce7bc17ac106a16437e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291429b0d1f38a5a0b76af7451120d88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7d2a2da5144f0bf6ce091c56b3d5a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/8bbbf02d-111d-4c33-a550-ada823242705.png?resizew=155)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e6acc3f368fa36ad9ca5cf09f1998d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8badfeb9e7556486e02ab60df4dd32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c6e025c4876a06fc3a82ae5d476779.png)
您最近一年使用:0次
解题方法
5 . 如图,在四棱台
中,底面
是菱形,
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/49b2e079-2571-4fa3-88b5-eb6c650030ee.png?resizew=164)
(1)求三棱锥
的体积;
(2)求平面
与平面
夹角的余弦值.
![](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/b8115c7ad0f0fda71c1b986ebc677bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d7e19a17928e09a22b79e84f5f14de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/49b2e079-2571-4fa3-88b5-eb6c650030ee.png?resizew=164)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07cfcd1c81b27ad23408261c64528c80.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
您最近一年使用:0次
名校
解题方法
6 . 将矩形面
绕边
顺时针旋转
得到如图所示几何体
.已知
,
,点E在线段
上,P为圆弧
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/1fd38787-154b-4586-88e5-e0012837cbff.png?resizew=147)
(1)当E是线段
的中点时,求异面直线AE写
所成角的余弦值;
(2)在线段
上是否存在点E,使得
平面
?如果存在,求出线段BE的长,如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/1fd38787-154b-4586-88e5-e0012837cbff.png?resizew=147)
(1)当E是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ae72f5e5891249caa10c43224da89c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022129b7ae91e9a6a8badb203d2045a1.png)
您最近一年使用:0次
2024-02-28更新
|
169次组卷
|
2卷引用:四川省眉山市彭山区第一中学2023-2024学年高二下学期开学考试数学试题
解题方法
7 . 已知梯形
中,
,
,
,
,
.如图,将
沿对角线
翻折至
,使得
,则异面直线
,
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1229ba36a93222692bf76be9695bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ea25ef38e4afa8f75ffd0842890289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf620ceea251b79d97d3e96273788afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/331bfc93-16b5-472d-b900-b8dd8f77ad28.png?resizew=170)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-02-14更新
|
235次组卷
|
4卷引用:四川省绵阳市江油市太白中学2023-2024学年高二下学期开学考试数学试题
四川省绵阳市江油市太白中学2023-2024学年高二下学期开学考试数学试题福建省厦门市2023-2024学年高二上学期1月期末质量检测数学试题(已下线)第三章 折叠、旋转与展开 专题一 平面图形的翻折、旋转 微点1 翻折、旋转中的基本问题(一)(已下线)第三章 折叠、旋转与展开 专题一 平面图形的翻折、旋转 微点8 平面图形的翻折、旋转综合训练
名校
8 . 如图,在四棱锥
中,
,
,
,
.
平面
;
(2)若
,
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4117625867a74cd022584500c76deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d028a62fea771beb2d18f0c1bf856c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974dfc1ed9575acd66c455b802d8c480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5c5c5663a8e258b008eaef1e98aa42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9b6533a5c31254ab87ceaa6e3c1320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025bd67fe567a0966605c53ea9a44788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
您最近一年使用:0次
2024-02-04更新
|
1609次组卷
|
8卷引用:四川省内江市第六中学2023-2024学年高二下学期入学考试数学试题
四川省内江市第六中学2023-2024学年高二下学期入学考试数学试题四川省成都市第七中学高中2020届高三高中毕业班三诊模拟数学(理科)试题海南省海南中学2023-2024学年高三上学期第5次月考数学试题(已下线)第3章 空间向量及其应用(知识归纳+题型突破)-2023-2024学年高二数学单元速记·巧练(沪教版2020选择性必修第一册)(已下线)黄金卷03(2024新题型)2024届河北省承德市部分高中二模数学试题河北省衡水市部分学校2024届高三下学期二模考试数学试题江西省南昌市第十九中学2024届高三下学期第三次模拟考试数学试题
名校
解题方法
9 . 如图,在三棱柱中,
,
,
为
的中点,平面
平面
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebe6a446b91e73b181f9f4d56264dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d8afb6a50406ba4c6621f4976c8dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f25c5543b39190dc2499aa66f939659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642a7dd471434c923f76809dfa5ee183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
您最近一年使用:0次
2024-01-31更新
|
398次组卷
|
7卷引用:四川省内江市第六中学2023-2024学年高二下学期入学考试数学试题
名校
解题方法
10 . 如图,在三棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/8aba6356-3813-450b-962a-b303a1286d21.png?resizew=163)
(1)证明:平面
平面
;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06c1cedcc4406a91783f9d37cab421e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/8aba6356-3813-450b-962a-b303a1286d21.png?resizew=163)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3a9f832c20d05940e7072552aaede3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130e68a02a2aa5b667c46401732d6284.png)
您最近一年使用:0次
2024-01-31更新
|
251次组卷
|
2卷引用:四川省绵阳市南山中学2024届高三下学期入学考试数学(理)试题