名校
解题方法
1 . 如图,四棱锥
中,底面
为菱形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/d60c71b4-5894-4ddd-a008-74e5f563146a.png?resizew=137)
(1)证明:
;
(2)若
,
,求平面
与平面
所成夹角的余弦值.
![](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/32d0710321d97361e5782124bbf7f0c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/d60c71b4-5894-4ddd-a008-74e5f563146a.png?resizew=137)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85aeab3aeaf4367b711da8cde2e8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af8490391445115ee59660e3465f548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
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2023-05-13更新
|
596次组卷
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3卷引用:甘肃省2023届高三第三次高考诊断考试理科数学试题
解题方法
2 . 已知双曲线C:
的离心率为
,点
在双曲线上.
(1)求双曲线C的方程;
(2)若A,B为双曲线的左、右顶点,
,若MA与C的另一交点为P,MB与C的另一交点为Q(P与A,Q与B均不重合)求证:直线PQ过定点,并求出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12044661d15a805a90206c16f6e8a7d.png)
(1)求双曲线C的方程;
(2)若A,B为双曲线的左、右顶点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fb95c0dbba2ce77a7dcc42fa06e058.png)
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2023-03-11更新
|
518次组卷
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3卷引用:甘肃省张掖市2023届高三下学期4月联考数学(理)试题
名校
3 . 如图,在四棱锥P-ABCD中,底面ABCD是平行四边形,PA⊥平面ABCD,
,点M在棱PD上,且
,
.
(1)求证:CD⊥平面PAD;
(2)求BM与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8bce2a210462ca55bbb1222faabe45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e47ec65653edea82cf1aa8e992fcf8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a52818f1e8b7c27f207abae182a64d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/17/be5f7759-3d1f-4825-b4d6-7c0accd1170a.png?resizew=170)
(1)求证:CD⊥平面PAD;
(2)求BM与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
您最近一年使用:0次
4 . 已知
是椭圆
的左、右焦点,
是椭圆的短轴,菱形
的周长为
,面积为
,椭圆
的焦距大于短轴长.
(1)求椭圆
的方程;
(2)若
是椭圆
内的一点(不在
的轴上),过点
作直线交
于
两点,且点
为
的中点,椭圆
的离心率为
,点
也在
上,求证:直线
与
相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc9076974ebd6331d67055302be8167.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e694ed4fd4d76f641a4212908c0aa55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74e933de1a9cf13a487687c8b33187a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
您最近一年使用:0次
2023-03-23更新
|
355次组卷
|
3卷引用:甘肃省兰州市2023届高三下学期诊断考试文科数学试题
名校
解题方法
5 . 已知椭圆
的长轴长为4,A,B是其左、右顶点,M是椭圆上异于A,B的动点,且
.
(1)求椭圆C的方程;
(2)若P为直线
上一点,PA,PB分别与椭圆交于C,D两点.
①证明:直线CD过椭圆右焦点
;
②椭圆的左焦点为
,求
的内切圆的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e870d323a62a728a87efd0d58a6604.png)
(1)求椭圆C的方程;
(2)若P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
①证明:直线CD过椭圆右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
②椭圆的左焦点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe9ac6c866f9b2fd2eca32a5da2c298.png)
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2023-04-16更新
|
1528次组卷
|
8卷引用:甘肃省2023届高三二模理科数学试题
甘肃省2023届高三二模理科数学试题甘肃省武威市凉州区2023届高三下学期第四次诊断考试数学(理)试题(已下线)数学(全国甲卷理科)(已下线)湖南省新高考教学教研联盟2023届高三下学期4月第二次联考数学试题变式题17-22(已下线)专题15解析几何(解答题) 吉林省长春市实验中学2022-2023学年高三下学期模拟考试(五)数学试题福建省永春第一中学2022-2023学年高二下学期期末考试数学试题(已下线)专题15 圆锥曲线综合
解题方法
6 . 已知椭圆
的长轴长为4,A,B是其左、右顶点,M是椭圆上异于A,B的动点,且
.
(1)求椭圆C的方程;
(2)若P为直线
上一点,PA,PB分别与椭圆交于C,D两点.
①证明:直线CD过椭圆右焦点
;
②椭圆的左焦点为
,求
的周长是否为定值,若是,求出该定值,若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e870d323a62a728a87efd0d58a6604.png)
(1)求椭圆C的方程;
(2)若P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
①证明:直线CD过椭圆右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
②椭圆的左焦点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe9ac6c866f9b2fd2eca32a5da2c298.png)
您最近一年使用:0次
2023-04-16更新
|
900次组卷
|
6卷引用:甘肃省2023届高三二模文科数学试题
甘肃省2023届高三二模文科数学试题甘肃省武威市凉州区2023届高三下学期第四次诊断考试数学(文)试题甘肃省2023届高三第二次诊断文科数学试题(已下线)数学(全国甲卷文科)(已下线)专题15解析几何(解答题)四川省成都市简阳市阳安中学2023届高三模拟训练(一)数学(文科)试题
名校
解题方法
7 . 如图,在底面为矩形的四棱锥
中,PA⊥底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/d9e02b87-edcb-4288-b7f6-1a71c47877e2.png?resizew=159)
(1)证明:平面PAD⊥平面PCD.
(2)若
E在棱AD上,且
,求PE与平面PBD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://img.xkw.com/dksih/QBM/editorImg/2023/5/3/d9e02b87-edcb-4288-b7f6-1a71c47877e2.png?resizew=159)
(1)证明:平面PAD⊥平面PCD.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f18f775dcfd942885aca1efb439e60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be62ac0f5edb1eaebb5f491a7c30f97b.png)
您最近一年使用:0次
名校
解题方法
8 . 已知四棱锥
中,底面ABCD为平行四边形,
底面ABCD,若
,
,E,F分别为
,
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a7720b20-45ce-4f05-95dd-48d4c3c842cc.png?resizew=205)
(1)求证:
平面PBC;
(2)当
时,求平面PEF与平面PAD所成角的正切值.
![](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/0d6baf49925a5bcb359b542d45067c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a7720b20-45ce-4f05-95dd-48d4c3c842cc.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2951b9f77413d5f062acb300b09de1f6.png)
您最近一年使用:0次
2023-04-16更新
|
808次组卷
|
5卷引用:甘肃省2023届高三二模理科数学试题
名校
解题方法
9 . 如图,在四棱锥
中,
底面
,底面
是矩形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/655e8c62-2ec0-469f-8277-19bb2945eaff.png?resizew=154)
(1)证明:
.
(2)求二面角
的平面角的余弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/466deee706eb335b7d05b35bfc9319b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/655e8c62-2ec0-469f-8277-19bb2945eaff.png?resizew=154)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186e5e7efe51fd25b9e38dc0fa23de9d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1269599d8f29c769773c8288e91b831.png)
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2023-03-24更新
|
1011次组卷
|
4卷引用:甘肃省兰州市第五十八中学2022-2023学年高三下学期第二次模拟考试数学(理科)试卷
名校
10 . 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