名校
1 . 如图,四棱锥
的底面为正方形,
底面
,
,设平面
与平面
的交线为
,Q为
上的点,下列说法正确的为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/8bc0a7ac-5932-423b-b637-b963c20ef021.png?resizew=192)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b624742fe28db114e0554c6c87bff05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/8bc0a7ac-5932-423b-b637-b963c20ef021.png?resizew=192)
A.![]() |
B.![]() ![]() |
C.四棱锥![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
2022-12-01更新
|
271次组卷
|
2卷引用:江西省上高二中2022-2023学年高二上学期第三次月考(12月)数学试题
名校
2 . 如图,在三棱锥
中,
分别为
的中点,且
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/22bb1baf-9eab-4922-8dea-4eb758ad8744.png?resizew=157)
(1)求证:
;
(2)若
,
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610a917dc47fe622a3f61023712a6ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/22bb1baf-9eab-4922-8dea-4eb758ad8744.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b0728555c1ec78d4407bf0ef255310.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70549f69b308c9a322cc4da1bf9e2af7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a4e18417dc07aa681d88ae325dace9.png)
您最近一年使用:0次
2022-11-30更新
|
433次组卷
|
3卷引用:江西省抚州市金溪县第一中学2023届高三上学期11月段考数学(理)试题
名校
解题方法
3 . 如图,在四棱锥
中,底面ABCD为平行四边形,
,
,
底面ABCD,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/ce77e92d-a0d2-48c2-8ba3-75e2f0b02c45.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7a42341edbc0b01ab0769c4c02c3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a340e906c06568ec3af87e5602435400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/ce77e92d-a0d2-48c2-8ba3-75e2f0b02c45.png?resizew=175)
A.![]() |
B.PB与平面ABCD所成角为![]() |
C.异面直线AB与PC所成角的余弦值![]() |
D.平面PAB与平面ABCD所成的二面角为45° |
您最近一年使用:0次
2022-11-30更新
|
771次组卷
|
7卷引用:江西省宜春市宜丰县宜丰中学2022-2023学年高一创新部上学期第三次月考(12月)数学试题
江西省宜春市宜丰县宜丰中学2022-2023学年高一创新部上学期第三次月考(12月)数学试题辽宁省实验中学2022-2023学年高二上学期第二次阶段测试数学试题湖南省衡阳市衡阳县第二中学2023-2024学年高二上学期期末达标测试数学试题(A卷)陕西省宝鸡市千阳县中学2023-2024学年高二上学期期末达标测试数学试题(A卷)(已下线)期末精确押题之多选题(40题)-2023-2024学年高二数学上学期《考点·题型·难点》期末高效复习(人教A版2019)(已下线)高二数学第一学期期期末押题密卷05卷(已下线)第七章 应用空间向量解立体几何问题拓展 专题二 平面法向量求法及其应用 微点3 平面法向量求法及其应用综合训练【培优版】
名校
解题方法
4 . 如图,在三棱锥
中,已知
,
,
为
的中点,
平面
,
,
为
的中点,点
在
上,满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/eff87e2e-9a36-4c8b-a718-3007662213c6.png?resizew=135)
(1)求点
到平面
的距离;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba6fb5afc7fd86226985c0bd5e53b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189ff6fc87c512480892db6dabd010c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48208a3f67fd590d973badcc742d4b1.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/87d695777dd64fd9433c2c40c40b4ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b807349b150900f92fb06d9c01679a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526dff4710b20c9a9cb5d84ac3694a8b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/eff87e2e-9a36-4c8b-a718-3007662213c6.png?resizew=135)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4dd6baf95be502586df9f93582ddc9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27daee2bab56f1808877c2e2594f8324.png)
您最近一年使用:0次
2022-11-28更新
|
718次组卷
|
5卷引用:江西省临川第二中学2022-2023学年高二上学期第三次月考数学试题
名校
解题方法
5 . 如图,在直三棱柱
中,
是等边三角形,
,
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f21b4c8b-8b00-4e04-b8dd-68e19e36b9c0.png?resizew=177)
(1)证明:平面
平面
.
(2)若
,求二面角
的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f21b4c8b-8b00-4e04-b8dd-68e19e36b9c0.png?resizew=177)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f3c1b59a81027f370cb0f205892e76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb239882ad6cb57fd445327569f600e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7724eb0689ca6c10eb9a88a0efbceb8c.png)
您最近一年使用:0次
2022-11-27更新
|
492次组卷
|
5卷引用:江西省上高二中2022-2023学年高二上学期第三次月考(12月)数学试题
名校
6 . 在多面体ABCDE中,平面ACDE⊥平面ABC,四边形ACDE为直角梯形,
,AC⊥AE,AB⊥BC,CD=1,AE=AC=2,F为DE的中点,且点
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/65ab50c7-7807-4807-bd48-396fec61cb0a.png?resizew=150)
(1)证明:GF
平面ABC;
(2)当多面体ABCDE的体积最大时,求二面角A-BE-D的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41bf5ba46efcc6dbc8e527a94ed2343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e27e7ca8862c8843d15080709a88fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/65ab50c7-7807-4807-bd48-396fec61cb0a.png?resizew=150)
(1)证明:GF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67be899bc131ec1b9921ae9787c40d5.png)
(2)当多面体ABCDE的体积最大时,求二面角A-BE-D的正弦值.
您最近一年使用:0次
2022-11-25更新
|
1507次组卷
|
5卷引用:江西省南昌市第二中学2023届高三上学期第四次考试数学(理)试题
江西省南昌市第二中学2023届高三上学期第四次考试数学(理)试题江西省南昌市第十中学2023届年高三第一次模拟数学(理)试题陕西省渭南市2023届高三下学期教学质量检测(Ⅰ)理科数学试题(已下线)模块十一 立体几何-2(已下线)广东省广州市中山大学附属中学2024届高三上学期期中数学试题变式题19-22
解题方法
7 . 如图,在四棱锥
中,
平面
,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/3ca50c8b-160f-4ed7-87ea-a3d1e1e115d8.png?resizew=195)
(1)求点
,
到平面
的距离之和;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f062d753bff791e0e8e1ec541ebffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4eb1b11eb4968b3dc1ea99c01c0c4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb79f69e0f556c3fccc7dc68935e462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/3ca50c8b-160f-4ed7-87ea-a3d1e1e115d8.png?resizew=195)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa7077b64e5d67e5a43d7661e260136.png)
您最近一年使用:0次
名校
解题方法
8 . 若异面直线
和
的方向向量分别为
,
,则直线
与直线
所成角的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91871d75ebf5b583b34efa82bda9e00a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9822763fd0dc9f780f1e609c6ee8233b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2022-11-23更新
|
420次组卷
|
2卷引用:江西省崇仁一中、广昌一中、金溪一中2022-2023学年高二上学期第二次联考数学试题
名校
9 . 在
中,
,
,
分别
上的点且
,
,将
沿
折起到
的位置,使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/18ae9419-da1e-4a0f-9da9-10334277603b.png?resizew=224)
(1)求证:
;
(2)是否在射线
上存在点
,使平面
与平面
所成角的余弦值为
?若存在,求出
的长度;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636c0562f0438a892d9df679e9e08d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9a415bdb7b4e1e35c18a9e53205392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad8f19018ce02050585d6bd6e0bc0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2fef4031c10abc18c8747af6b9a8a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/18ae9419-da1e-4a0f-9da9-10334277603b.png?resizew=224)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01676a558e64ef15c9afacbc7acda293.png)
(2)是否在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75d14708e6aa1404477db9d7e3166f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43819ab7b268a6293a9251935b594690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6994042288fbd7cdf7d0f2d83e3afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed24aeda4260685f4e1bd6b78a8ff25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
您最近一年使用:0次
2022-11-20更新
|
1336次组卷
|
5卷引用:江西省上高二中2023届高三上学期第四次月考数学(理)试题
10 . 如图,在四棱锥
中,
平面
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/9c8fe745-7a33-44eb-9ea0-0090520280f0.png?resizew=171)
(1)证明:
平面
.
(2)若
,点
在棱
上,求平面
与平面
夹角的余弦值的最小值.
![](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/728fcb9b078221a54ca841145ab93227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/9c8fe745-7a33-44eb-9ea0-0090520280f0.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee90881c743e2cff2e3128d6bdb86174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
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3卷引用:江西省名校联盟2022-2023学年高二上学期期中联考数学试题