名校
解题方法
1 . 如图一,
是等边三角形,
为
边上的高线,
分别是
边上的点,
;如图二,将
沿
翻折,使点
到点
的位置,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/af9b0021-87e5-440f-a329-d353d0cb30d8.png?resizew=296)
(1)求证:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1f94af7f35686f4a8a268392abc9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd6f76264612be2544dd4d35b2e44ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764829cc2c763b6aca0665aa143e304e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/af9b0021-87e5-440f-a329-d353d0cb30d8.png?resizew=296)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc6f007dbf1c1a36eb031e520608403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d009276f9d1f5fc1a168f9e364a1b5ea.png)
您最近一年使用:0次
2023-04-16更新
|
1471次组卷
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4卷引用:辽宁省锦州市2023届高三二模数学试题
名校
2 . 如图,直四棱柱
被平面
所截,截面为CDEF,且
,
,
,平面EFCD与平面ABCD所成角的正切值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/78f0fa67-b240-466a-845c-56301d17514f.png?resizew=161)
(1)证明:
;
(2)求直线DE与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeeadcae4a2964c73187962918724ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd61d05bd1dd1b79e062830dc57fce2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a311738db3fc5431d14a0942542a62e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c62821fa0d0a3316d030a6a20e4a62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/78f0fa67-b240-466a-845c-56301d17514f.png?resizew=161)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
(2)求直线DE与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c74f639bbbda2ddf33d0f236fdb1e4b.png)
您最近一年使用:0次
名校
解题方法
3 . 在四棱锥
中,四边形
为等腰梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/54c309ed-3c06-4901-9534-1984b5f08879.png?resizew=133)
(1)证明:平面
平面
;
(2)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/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b09f34fb06ae90a8d7b1a25ea01645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e766e52e5f64705a847ff1dbaba69c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/54c309ed-3c06-4901-9534-1984b5f08879.png?resizew=133)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0063f3f48e49f2970ec7f097567cef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58bbc02479917ad761a24eaae0dbfd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-04-09更新
|
2166次组卷
|
6卷引用:辽宁省县级重点高中联合体2023届高三二模数学试题
辽宁省县级重点高中联合体2023届高三二模数学试题山西省部分学校2023届高三下学期4月联考数学试题河南省创新发展联盟2023届高三下学期二模考试数学(理)试题吉林省白山市2023届高三下学期四模联考(4月期中)数学试题(已下线)四川省雅安市2022-2023学年高二下学期期末检测数学(理)试题(已下线)专题10 立体几何综合-1
4 . 已知定圆F:
,动圆H过点
且与圆F相切,记圆心H的轨迹为C.
(1)求曲线C的方程.
(2)已知
,
,点M是曲线C上异于A、B的任意一点,设直线AM与直线l:
交于点N,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8607b7bdbcb604e6fcfbccb66ed2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97fb96d52f1ab7cd9c4e9427838bd6e6.png)
(1)求曲线C的方程.
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/652e8c360aa4f6aeda334c4b966eda03.png)
您最近一年使用:0次
2023-06-06更新
|
517次组卷
|
2卷引用:辽宁省锦州市渤海大学附属高级中学2023届高三第六次模拟考试数学试题
名校
5 . 刍甍(chú méng)是中国古代数学书中提到的一种几何体,《九章算术》中对其有记载:“下有袤有广,而上有袤无广”,可翻译为:“底面有长有宽为矩形,顶部只有长没有宽为一条棱.”,如图,在刍甍
中,四边形ABCD是正方形,平面
和平面
交于
.
;
(2)若平面
平面ABCD,
,
,
,
,求平面
和平面
所成角余弦值的绝对值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ba3f676fda6a2aaaa55c9f32874a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666734423f1818d76a74f171b7420b68.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c1acdd27cebb11e0266464b03b3afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869dbfaf24d441c4ce3a2b8db86cd2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678988261e6fd7c4f1199c0204a8045d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ba3f676fda6a2aaaa55c9f32874a51.png)
您最近一年使用:0次
6 . 已知圆心在x轴上移动的圆经过点
,且与x轴,y轴分别交于M,N两个动点,线段MN中点Q的轨迹为曲线
.
(1)求曲线
的方程;
(2)已知直线l分别与曲线
和抛物线
:
交于四个不同的点
,
,
,
,且
.
(i)求证:
;
(ii)设l与x轴交于点G,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cc0f9aa168e43cc5759f017d69b498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)已知直线l分别与曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6050b7ee89e71e1bda14bed616995296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbd7d48325a0795ccdf9497fc1523ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cbbdcb7eb941e701d2b8a3cc7b65b9.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7cc9ffc2874dffd0b74ffbfc627916.png)
(ii)设l与x轴交于点G,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77f08fc028280d71b961409740323a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1b5fcd1c6d3a0a7cb9814a3d736b21.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,四棱锥
的底面是正方形,点P,Q在侧棱
上,E是侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/292d7c25-3b3c-4071-947d-c43b2fdab7b5.png?resizew=166)
(1)若
,证明:BE∥平面
;
(2)若每条侧棱的长都是底面边长的
倍,从下面两个条件中选一个,求二面角
的大小.
①
平面
;②P为
的中点.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/292d7c25-3b3c-4071-947d-c43b2fdab7b5.png?resizew=166)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6735a1316a6933da9d4588d1d39a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若每条侧棱的长都是底面边长的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9f1e2b86f4eca37c72011d3dffb0c9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
注:如果选择多个条件分别解答,按第一个解答计分.
您最近一年使用:0次
2023-03-20更新
|
813次组卷
|
4卷引用:辽宁省抚顺市2023届普通高中应届毕业生高考模拟数学试题
名校
解题方法
8 . 如图,已知四棱锥
,底面
是平行四边形,且
,
是线段
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/c325f0d4-4f9d-44df-a7f6-730cabff049c.png?resizew=190)
(1)求证:
平面
;
(2)下列条件任选其一,求二面角
的余弦值.
①
与平面
所成的角为
;
②
到平面
的距离为
.
注:如果选择多个条件分别解答,按一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf80b036459da6dcb841a4bbe3859fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f263f14b3fe980704a29114af713b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d5ee2d6fcbcad17b69997ef0741d2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/c325f0d4-4f9d-44df-a7f6-730cabff049c.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/444a99fc825b4929e46c810f7bd393b0.png)
(2)下列条件任选其一,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6aaed07f0b69eee41de11613fc74de.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b3ef121201d34187b7fa9be55f84b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
注:如果选择多个条件分别解答,按一个解答计分.
您最近一年使用:0次
2023-03-25更新
|
1467次组卷
|
4卷引用:辽宁省协作校2023届高三下学期第一次模拟考试数学试题
辽宁省协作校2023届高三下学期第一次模拟考试数学试题黑龙江省哈尔滨市第九中学校2023届高三第五次模拟考试数学试卷(已下线)高二上学期期中复习【第一章 空间向量与立体几何】十大题型归纳(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)高二上学期期中考试解答题压轴题50题专练-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)
9 . 如图,四棱锥
中,底面
是菱形,
底面
,
,M为
的中点,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/e0738b61-bcfb-46e0-8983-bbc14245ffef.png?resizew=171)
(1)证明:
;
(2)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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d092c7e025551511ce7a5534a8e37f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d24305d21268a9b67cf6a8daae6bbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564376a88fa74090de9f7694226a6184.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/e0738b61-bcfb-46e0-8983-bbc14245ffef.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb350b8e577a7b6712031a3b5b98309.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9425d8a91387c31725148358892779bb.png)
您最近一年使用:0次
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解题方法
10 . 已知双曲线
的离心率为
,左、右焦点分别为
,点
坐标为
,且
.
(1)求双曲线
的方程;
(2)过点
的动直线
与
的左、右两支分别交于两点
,若点
在线段
上,满足
,证明:
在定直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebea65c8dd958863a1f99eee597facf.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a82febec64da412b0a7d0473f2522c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2023-04-16更新
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5卷引用:辽宁省锦州市2023届高三二模数学试题
辽宁省锦州市2023届高三二模数学试题广西壮族自治区南宁市第三中学2023届高三模拟数学(理)试题(一)(已下线)押新高考第21题 圆锥曲线湖南省常德市汉寿县第一中学2023-2024学年高二上学期11月期中数学试题(已下线)第五篇 向量与几何 专题4 极点与极线 微点4 极点与极线问题常见模型总结(二)