1 . 已知点
,直线l:y=4,P为曲线C上的任意一点,且
是P到l的距离的
.
(1)求曲线C的方程;
(2)若经过点F且斜率为
的直线交曲线C于点M、N,线段MN的垂直平分线交y轴于点H,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2347bec7975dab2b8bce2fd19b1237d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac654a052f98d1ccb7fede1f122cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求曲线C的方程;
(2)若经过点F且斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417e93ffbafff837d488042e1813cefe.png)
您最近一年使用:0次
2022-04-25更新
|
2147次组卷
|
5卷引用:贵州省贵阳市五校2022届高三联合考试(七)数学(文)试题
贵州省贵阳市五校2022届高三联合考试(七)数学(文)试题贵州省铜仁市2023届高三上学期期末质量监测数学(理)试题河南省五市2022届高三第二次联合调研检测文科数学试题(已下线)考点23圆锥曲线综合应用-1-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)(已下线)专题29 弦长问题及长度和、差、商、积问题-2
名校
解题方法
2 . 如图,在三棱锥
中,
是边长为4的正三角形,
,
,点
在底面
上的投影为点
.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957146743906304/2958153052717056/STEM/51e97295827d4c1085c7792653f0c998.png?resizew=205)
(1)求证:平面
平面
.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b593497504e969c0eee7323ea788b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957146743906304/2958153052717056/STEM/51e97295827d4c1085c7792653f0c998.png?resizew=205)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
您最近一年使用:0次
2022-04-14更新
|
690次组卷
|
5卷引用:贵州省普通高等学校招生2022届高三全国统一模拟测试数学(理)试题
贵州省普通高等学校招生2022届高三全国统一模拟测试数学(理)试题(已下线)回归教材重难点03 空间向量与立体几何-【查漏补缺】2022年高考数学(理)三轮冲刺过关2022年全国100所名校最新高考模拟示范卷高三理科数学卷(五)(已下线)一轮复习适应训练卷(6)-2022年暑假高二升高三数学一轮复习适应训练卷 全国通用 重庆市凤鸣山中学2023届高三下学期第一次月考数学试题
名校
解题方法
3 . 如图,四棱锥
中,
,
,
,
平面CDP,E为PC中点.
![](https://img.xkw.com/dksih/QBM/2022/2/11/2914373101699072/2934011990695936/STEM/4e5226ea-4a53-493f-ac64-ca6f018ed23a.png?resizew=217)
(1)证明:
平面PAD;
(2)若
平面PAD,
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://img.xkw.com/dksih/QBM/2022/2/11/2914373101699072/2934011990695936/STEM/4e5226ea-4a53-493f-ac64-ca6f018ed23a.png?resizew=217)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137fcdac119eff6ac5990b6d201615df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245440d3761fb4217eaa8dc303fa288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e76d46719c1c1f0fe0a394872c20c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d07f36efcb9d203267d7c0409720cf.png)
您最近一年使用:0次
2022-03-11更新
|
868次组卷
|
5卷引用:贵州省毕节市2022届高三下学期诊断性考试(二)数学(理)试题
贵州省毕节市2022届高三下学期诊断性考试(二)数学(理)试题云南省昭通市永善、绥江县2021-2022学年高二3月月考数学试题青海省西宁市2022届高三一模数学(理)试题(已下线)专题20 平行垂直与空间向量在立体几何中的应用-2022届高考数学一模试题分类汇编(新高考卷)云南省大理下关第一中学教育集团2022~2023学年高二上学期段考(二)数学(B卷)试题
名校
解题方法
4 . 如图,在四棱锥
中,
,△
是边长为2的正三角形,平面PCD⊥平面ABCD,
,点E,F,H分别是线段PB,PC,AB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/1a1848e6-4f49-4550-95aa-4f484daac36c.png?resizew=193)
(1)求证:点H在平面DEF内;
(2)若二面角
的余弦值为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb99353e3076643c832c8973ac8a6c1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/1a1848e6-4f49-4550-95aa-4f484daac36c.png?resizew=193)
(1)求证:点H在平面DEF内;
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e685dde92d0192739da59f6e43b808e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e468f168f3657d84d44be5eb89a62d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8504651146697b0ecca4f789790d41ed.png)
您最近一年使用:0次
2022-05-12更新
|
491次组卷
|
2卷引用:贵州省毕节市2022届高三诊断性考试(三)数学(理)试题
解题方法
5 . 如图1,正方形
中,
,
,将四边形
沿
折起到四边形
的位置,使得二面角
的大小为60°(如图2).
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871714033606656/2873145373868032/STEM/96af71d51ce74e388c23b07374a4721c.png?resizew=444)
(1)证明:平面
平面
;
(2)若
,
分别为
,
的中点,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c313fea2b6a674896d41950e939fe07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c0056e2c3b2cd44963465b922260b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515f2668c6ab5e6d0679218ea9c8e4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7192b649ac5f5baf2f6ec509b0c49.png)
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871714033606656/2873145373868032/STEM/96af71d51ce74e388c23b07374a4721c.png?resizew=444)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643701e7855ef0458513290a99b78f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712d9d9e29645c1df6ae23125b4aa1cc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce9e1664f888e70b0bec872178dccd5.png)
您最近一年使用:0次
名校
解题方法
6 . 已知椭圆
的短轴长为2,离心率为
,点A是椭圆的左顶点,点E坐标为
,经过点E的直线l交椭圆于M,N两点,直线l斜率存在且不为0.
(1)求椭圆C的方程;
(2)设直线AM,AN分别交直线
于点P,Q,线段PQ的中点为G,设直线l与直线EG的斜率分别为k,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(1)求椭圆C的方程;
(2)设直线AM,AN分别交直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e08d5c04f0431fb57b33a01717b599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612367da04a206b8b4369985c367e8f2.png)
您最近一年使用:0次
2022-01-12更新
|
1349次组卷
|
4卷引用:贵州省贵阳市五校2022届高三联合考试(七)数学(理)试题
名校
解题方法
7 . 如图,在正方体
中,
,
,
,
分别是棱
,
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953921118093312/2954543124815872/STEM/75ce97b9db6f4905a44cbcab2331273b.png?resizew=189)
(1)求证:
,
,
,
四点共面,记过这四点的平面为
,在图中画出平面
与该正方体各面的交线(不必说明画法和理由);
(2)设(1)中平面
与该正方体六个面所成锐二面角大小分别为
(
=1,2,3,4,5,6),求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953921118093312/2954543124815872/STEM/75ce97b9db6f4905a44cbcab2331273b.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)设(1)中平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b41b191550e3e4e43e8284452d97791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651dca2fc1fc9211d1dce05055651cc.png)
您最近一年使用:0次
2022-04-09更新
|
459次组卷
|
3卷引用:贵州省普通高等学校招生2022届高三适应性测试数学(理)试题
解题方法
8 . 已知直线
,M为平面内一动点,过M作l的垂线,垂足为N,且
(O为坐标原点),动点M的轨迹记为
.
(1)证明
为抛物线,并指出它的焦点坐标.
(2)已知
,直线
与
交于A,B两点,直线
与
的另一交点分别是C,D,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a520beb0ae215a01f9de68d10d44d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2abe13e2d4176f55f71677bbbb6eb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22840186db0afc0e2b2e8915ce79b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71772103e821b6c2072643fedc867dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,在三棱柱
中,点
在底面
内的射影恰好是点C,点D是
的中点,且
.
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936550482518016/2938385949958144/STEM/a25af1fe-87ab-43d4-961e-e8dde84636dc.png?resizew=173)
(1)证明:
;
(2)已知
,
,
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c48119b3932497634478f656c752ec4.png)
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936550482518016/2938385949958144/STEM/a25af1fe-87ab-43d4-961e-e8dde84636dc.png?resizew=173)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffeea0a84cdd67bd8bed95bc0f8ae364.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059a9b88cc536a9181e8c3b96666c9f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
您最近一年使用:0次
2022-03-17更新
|
448次组卷
|
3卷引用:贵州省名校联盟2022届高三3月大联考数学(理)试题
10 . 如图,AC,BD为圆柱
底面
的两条直径,PA为圆柱
的一条母线,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/168f9bdf-6b03-4319-ac79-77e5157d2378.png?resizew=149)
(1)证明:
;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270ddac9587bf1ea553914cb69595ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270ddac9587bf1ea553914cb69595ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42de572d68ded125eccccc512c4fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/168f9bdf-6b03-4319-ac79-77e5157d2378.png?resizew=149)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c583493109d50c9e4634c05e9042a9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc790cfaa59a808c25a7edb95dc29fc.png)
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2卷引用:贵州省铜仁市2022届高三适应性考试数学(理)试题(—)