名校
1 . 如图,在四棱锥
中,
,且
,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/dc9700ce-fd2e-4832-829f-cf6335cae5f9.png?resizew=168)
(1)求证:
平面
;
(2)在线段
上是否存在点
,使得平面
与平面
的夹角的余弦值为
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b387ebd8271cfc6fbfcffc83faeda498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7619c71796c16a0e81cbb03ba0cfabb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a68d63e574aabd7636cda2d4c4b316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d754107dc33b6c848db7a459a68579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d79e7020414add95907e061df505ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ced8225ff27c8e3e1897b8629312d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/dc9700ce-fd2e-4832-829f-cf6335cae5f9.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce92b4208a58057391589c73e97024c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24fe5dc97c9b6296628a7f6c6f796a25.png)
您最近一年使用:0次
名校
2 . 如图,在四棱柱
中,四边形
是平行四边形,
,
,
,
,
为
的中点,且
.
(1)求证:
平面
;
(2)若平面
与平面
的夹角的余弦值为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c078a10649b3a953631690021aa59879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fc4baf66de980a95f267051e6b190d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/31/f1a7d905-8650-42ac-910a-75b64a3ee109.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6ab0386dde0643de8caf33f946072f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924d32b574fe69e43724304cf39513e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35ac94f0ea5d79ae4530f5a3116f670.png)
您最近一年使用:0次
2023-10-13更新
|
894次组卷
|
3卷引用:山西省孝义市2023-2024学年高二上学期10月月考数学试题
名校
解题方法
3 . 如图甲,在矩形
中,
为线段
的中点,
沿直线
折起,使得
点为
的中点,连接
,如图乙.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/40d753e3-9722-418e-a8dc-8e099a6e081d.png?resizew=332)
(1)求证:
;
(2)线段
上是否存在一点
,使得平面
与平面
所成角的余弦值为
?若不存在,说明理由;若存在,求出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f5e0b08422b2f93d122341b3d7672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d81d73077d45142f21ca67f80633f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35cb5a59879bfa249b9896d3458d43b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/40d753e3-9722-418e-a8dc-8e099a6e081d.png?resizew=332)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f4946f86dce1600096f79d7716ea03.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977a483bd52c08968f4097d10609be20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a261474cc7607d31a6324cb4df9c8896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,P为圆锥的顶点,O是圆锥底面的圆心,为底面直径,
为底面圆O的内接正三角形,点E在母线
上,且
,
.
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f5ba965420dfd5aa4da211682df096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)若点M为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
2023-11-26更新
|
1521次组卷
|
5卷引用:山东省日照市2024届高三上学期期中校际联合考试数学试卷
山东省日照市2024届高三上学期期中校际联合考试数学试卷广东省珠海市第一中学2024届高三上学期期末模拟数学试题河北省石家庄市第二中学2023-2024学年高二上学期期末第一次模拟考数学试题(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-2江苏省靖江高级中学2023-2024学年高二下学期3月月考数学试题
名校
解题方法
5 . 如图,在三棱柱
中,四边形
为正方形,四边形
为菱形,且
,平面
平面
,M为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/c9e04a98-3cb2-4c34-92a4-a8145b6c5ecb.png?resizew=138)
(1)求证:
;
(2)棱
(除两端点外)上是否存在点N,使得平面
与平面
夹角余弦值为
?若存在,请求出点N的位置,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d04812fd787f9677100063fcdbd3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936738c1218318b7ba951e54000ae21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fdab2e82a6c97a9f7d3692adab5a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/c9e04a98-3cb2-4c34-92a4-a8145b6c5ecb.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2356990631d0dd785ff78da06940bf8b.png)
(2)棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2137bd5707a3c613ed664b748ed528d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52191aebf3d65b3ef9a1937cfc9f5f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6265f5256804ccaff618cf8c0675eb8e.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在四棱锥
中,
,且
,底面
是边长为
的菱形,
.
(1)证明:面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
面
;
(2)若直线
与平面
所成角的正弦值为
,点
为棱
上的动点,求平面
与平面
夹角的正弦值的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bbaccd578a43b2397c8bdd50592fa07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/3781a6dd-fd38-4594-b49f-2802f180b55e.png?resizew=172)
(1)证明:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64484f96568410926e0c50898eba6e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-10-13更新
|
979次组卷
|
3卷引用:广东省深圳实验学校高中部2023-2024学年高二上学期第一阶段数学试题
广东省深圳实验学校高中部2023-2024学年高二上学期第一阶段数学试题广东省广州市协和中学2023-2024学年高二上学期期中数学试题(已下线)难关必刷01 空间向量的综合应用-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
名校
7 . 已知平行四边形ABCD如图甲,
,沿AC将
折起,使点D到达点P位置,且
,连接PB得三棱锥
如图乙.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/cc22188d-ec62-406c-a2c2-c08bd2a3d257.png?resizew=304)
(1)证明;
平面ABC;
(2)在线段PC上是否存在点M,使二面角
的余弦值为
,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686853e0629f88f347f1436711cece87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/cc22188d-ec62-406c-a2c2-c08bd2a3d257.png?resizew=304)
(1)证明;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
(2)在线段PC上是否存在点M,使二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e9ac46aabe38e5ea1a8cb0febc98af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ec70bc9d4f8f5df312e2f09ee3bcb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450aa785fe5021ea99abb8f496293f5a.png)
您最近一年使用:0次
名校
8 . 中国古代数学名著《九章算术》中记载:“刍甍者,下有袤有广,而上有袤无广.刍,草也.甍,屋盖也.”翻译为“底面有长有宽为矩形,顶部只有长没有宽为一条棱.刍甍是茅草屋顶.”现有一个刍甍如图所示,四边形ABCD为正方形,四边形ABFE,CDEF为两个全等的等腰梯形,
,
,
,
.
(1)当点N为线段AD的中点时,求证:直线
平面EFN;
(2)当点N在线段AD上时(包含端点),求平面BFN和平面ADE的夹角的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6034301fc4110da89bdb0f46ad82ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b578af6297446dfbf9fd7924b75adaef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/8f13343a-e8f9-4b74-931e-d9afd12785c4.png?resizew=213)
(1)当点N为线段AD的中点时,求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
(2)当点N在线段AD上时(包含端点),求平面BFN和平面ADE的夹角的余弦值的取值范围.
您最近一年使用:0次
2023-09-24更新
|
1451次组卷
|
11卷引用:吉林省东北师范大学附属中学2023-2024学年高二上学期第一次月考数学试题
吉林省东北师范大学附属中学2023-2024学年高二上学期第一次月考数学试题广东五校2022-2023学年高二下学期期末联考数学试题辽宁省部分名校2023-2024学年高二上学期联考数学试题四川省眉山市青神县青神中学校2023-2024学年高二上学期期中数学试题广东省广州市第四中学2023-2024学年高二上学期期中数学试题广东省广州市三校(南实、铁一、广外)2023-2024学年高二上学期期中联考数学试题广东省佛山市顺德德胜学校2023-2024学年高二上学期期中数学试题陕西省西安中学2023-2024学年高二上学期11月期中数学试题山东省济宁市兖州区2023-2024学年高二上学期期中考试数学试题(已下线)难关必刷01 空间向量的综合应用-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)(已下线)特训02 期末解答题汇编(第1-5章,精选38道)-2023-2024学年高二数学《重难点题型·高分突破》(人教A版2019选择性必修第二册)
名校
9 . 如图,在四棱台
中,底面
是正方形,
,
,
,
.
(1)求证:直线
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c98d0a336e7b78a3164df8231ab050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90b10ae50e3cf8663038cdeb697168c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a61472439de1ba85cfe33840b775f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295aced98768ce261e00fe6660a427a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/03e3086b-211f-478a-ae50-c6221513297d.png?resizew=169)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2b198824daf85c88054bda90664231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce12587a7129e4a6ba2837214c6c4cdf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0830c440cb5f1b816d17dcdebdba71a3.png)
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2023-10-12更新
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770次组卷
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3卷引用:山东普高大联考2023-2024学年高二上学期10月联合质量测评数学试题
名校
解题方法
10 . 如图,三棱锥
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/6f218124-45bc-4344-8ec7-35b35e1b2539.png?resizew=127)
(1)求证:
;
(2)是否存在点Q,满足
,且点Q到平面
的距离为1?若存在,求直线
与平面
所成角的正弦值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e938896130979d168332b9f7b3f91ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd88acaf36eb1db328fef1ee6172b3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/6f218124-45bc-4344-8ec7-35b35e1b2539.png?resizew=127)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)是否存在点Q,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e5564df71b7f5c72b0e14dfaa45abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次