名校
解题方法
1 . 如图,在四棱锥
中,四边形
是边长为3的正方形,
平面
,
,点
是棱
的中点,点
是棱
上的一点,且
.
平面
;
(2)求平面
和平面
夹角的大小.
![](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/c2a03ce143556f9770f6f665bf2ce448.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8459bfe1dd87957f217ffcd0d10f6f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a0d238b6e9b49bbea22a79402e8e4f.png)
您最近一年使用:0次
2023-07-22更新
|
486次组卷
|
6卷引用:吉林省白山市抚松县第一中学2023-2024学年高二上学期11月月考数学试题
2023·全国·模拟预测
名校
2 . 如图1所示,四边形ABCD中
,
,
,
,
,M为AD的中点,N为BC上一点,且
.现将四边形ABNM沿MN翻折,使得AB与EF重合,得到如图2所示的几何体MDCNFE,其中
.
(1)证明:
平面FND;
(2)若P为FC的中点,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7605ce6f221ce8cad191da0f84a216d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2dcb2121af2b6d4ead458972439308.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/2f54442b-3ded-4f7d-a1d3-cfa199fb6ee6.png?resizew=344)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(2)若P为FC的中点,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a3e7730e98d2af874d11664a5d084b.png)
您最近一年使用:0次
2023-11-22更新
|
1337次组卷
|
10卷引用:吉林省辽源市田家炳高级中学校2023-2024学年高二上学期12月月考数学试题
吉林省辽源市田家炳高级中学校2023-2024学年高二上学期12月月考数学试题(已下线)2024年普通高等学校招生全国统一考试理科数学领航卷(六)(已下线)2024年普通高等学校招生全国统一考试·信息卷理科数学(一)(已下线)2024年普通高等学校招生全国统一考试数学领航卷(八)(已下线)考点12 空间角 2024届高考数学考点总动员【练】宁夏石嘴山市平罗中学2023-2024学年高二上学期第三次月考数学试题(尖子班)四川省成都市武侯高级中学2023-2024学年高二上学期12月月考数学试题福建省漳州市诏安县桥东中学(霞葛教学点)2024届高三上学期第二次月考数学试题青海省西宁市2024届高三上学期期末联考数学(理)试题(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1
名校
解题方法
3 . 如图,在三棱锥
中,
⊥底面
,
.点
,
,
分别为棱
,
,
的中点,
是线段
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/bd72c31e-a21a-45f7-9db1-0a942655b866.png?resizew=154)
(1)求证:
∥平面
;
(2)求平面PAC与平面EMN所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/487b14c446e989c68d0e148cc557dbf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/bd72c31e-a21a-45f7-9db1-0a942655b866.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求平面PAC与平面EMN所成角的余弦值.
您最近一年使用:0次
2022-11-15更新
|
348次组卷
|
5卷引用:吉林省长春汽车经济技术开发区第三中学2023-2024学年高二上学期10月月考数学试题
名校
4 . 如图,在四棱锥
中,四边形
是菱形,
,
,
,点
是棱
的中点.
;
(2)求平面
与平面
所成角的余弦值.
![](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/32450995497b9e341be832e9efad3114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/955e33abb9ac22ea8765272f1926f936.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/8e4125524caac016727c80d2722c5ba3.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
2023-10-13更新
|
850次组卷
|
9卷引用:吉林省珲春市第一高级中学2023-2024学年高二下学期第一次月考数学试题
吉林省珲春市第一高级中学2023-2024学年高二下学期第一次月考数学试题河北省邯郸市肥乡区第一中学2023-2024学年高二上学期10月月考数学试题河南省实验中学2023-2024学年高三上学期期中数学试题北京市东直门中学2024届高三上学期阶段性检测数学试题广东省高州市某校2023-2024学年高二上学期期末学情数学练习卷河南省焦作市第十二中学2023-2024学年高二上学期10月月考数学试题陕西省榆林市第一中学2023-2024学年高二上学期期中考试数学试题甘肃省武威市2023-2024学年高二下学期6月月考数学试题内蒙古自治区兴安盟乌兰浩特市第四中学2023-2024学年高二下学期第一次月考数学试题
5 . 如图,在直四棱柱
中,
,
,
,E,F,G分别为棱
,
,
的中点.
(1)求
的值;
(2)证明:C,E,F,G四点共面.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/5a114031e9fd808124cf218d82d5cdc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/493cf5c0-82b4-4ae0-a96e-1c9670957b86.png?resizew=162)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf2922c94338fb5c91b8c1ff9bb7e34.png)
(2)证明:C,E,F,G四点共面.
您最近一年使用:0次
2023-10-09更新
|
310次组卷
|
7卷引用:吉林省部分名校2023-2024学年高二上学期10月联考数学试题
名校
6 . 在四棱锥
中,底面ABCD为直角梯形,
,
,
,平面
平面ABCD,
,E为PA中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/270c273f-f596-4647-ae44-7e89ab0f26df.png?resizew=186)
(1)求证:
平面PBC;
(2)已知平面PAD与平面PBC的交线为l,在l上是否存在点N,使二面角
的余弦值为
?若存在,请求出PN的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6be2b61f4a38e2ee2c1a01e00b3ae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e70d5be99ab8b058ff2fb4d8c3d0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca15fe5faca08d49a0382bc1941a497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2c4cc37d6ba218107c9c5d820740fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a336b440498d8480309d275946a8a01d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/270c273f-f596-4647-ae44-7e89ab0f26df.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ceccc2be66a348793f6f2ab018beb4a.png)
(2)已知平面PAD与平面PBC的交线为l,在l上是否存在点N,使二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243d4a25480a8ad75d1c7bdda3e25568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1dd362f843e640ce551ad1787c9873.png)
您最近一年使用:0次
2022-10-23更新
|
405次组卷
|
2卷引用:吉林省长春市长春吉大附中实验学校2022-2023学年高二上学期10月月考数学试题
解题方法
7 . 如图,在四棱锥
中,
平面
,底面
为正方形,
,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/68106064-7938-4137-8d19-ab4ade6e4596.png?resizew=162)
(1)求证:
平面
;
(2)求直线
与底面
所成角的正弦值;
(3)求平面
与底面
所成的较小角的余弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f958c3268b6ff8811cf871dc7588a6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/68106064-7938-4137-8d19-ab4ade6e4596.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
解题方法
8 . 已知焦点在
轴上的椭圆
,短轴长为
,焦距为2.
的标准方程;
(2)如图,已知点
,点
是椭圆的右顶点,直线
与椭圆
交于不同的两点
两点都在
轴上方,且
.证明:直线
过定点,并求出该定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90df816a36d5b2e7c76547e755def609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe25d001e0c2378973c8fdf595d7e2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d08dbfd03288ff12e7365b0e6331a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2023-08-23更新
|
1023次组卷
|
4卷引用:吉林省延边第二中学2023-2024学年高二上学期第一次阶段检测数学试卷
吉林省延边第二中学2023-2024学年高二上学期第一次阶段检测数学试卷云南省保山市高(完)中C、D类学校2022-2023学年高二下学期5月份联考数学试题(已下线)高二上学期期中复习【第三章 圆锥曲线的方程】十二大题型归纳(拔尖篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)专题02 期中真题精选(压轴93题10类考点专练)(3)
名校
解题方法
9 . 如图,已知圆柱
,过轴
的截面图形
为正方形,点
在底面圆周上,且
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/24415e6a-5152-4368-b6e3-44fba78012f8.png?resizew=188)
(1)求证:
平面
;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/837510568cd16b70c4e038ccaf0feb3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/24415e6a-5152-4368-b6e3-44fba78012f8.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2730b513bd3359c3dfe6567e04f5ef9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
您最近一年使用:0次
2022-08-30更新
|
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解题方法
10 . 已知双曲线C:
的左、右焦点分别为
,
,且
,若C上的点M满足
恒成立.
(1)求C的方程;
(2)若过点M的直线l与C的两条渐近线交于P,Q两点,且
.
(i)证明:l与C有且仅有一个交点;
(ii)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4f7e7f33963df24d6a46067b4677e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdb28eafa72ace7027ac32d7dae0906.png)
(1)求C的方程;
(2)若过点M的直线l与C的两条渐近线交于P,Q两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac480bb785925885de84d8284c428830.png)
(i)证明:l与C有且仅有一个交点;
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b206caf5ac005c8df99c13b258d3e179.png)
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