1 . 如图,在四棱锥
中,平面
平面
,四边形
为直角梯形,
,
.
(1)求证;
;
(2)若
,
,
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/466c9267-b170-47e3-ba85-bd4f0d0159f9.png?resizew=139)
(1)求证;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e04d8312c0ef5305ebfd7b4e71b317f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2647920a05871451cb9fb9290489688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2023-07-07更新
|
332次组卷
|
2卷引用:吉林省四平市文德高级中学2023-2024学年高二上学期第一次月考数学试题
名校
解题方法
2 . 如图,在三棱台
中,平面
平面ABC,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/6698ac67-aef7-4a6e-b2a1-8c87efe92cb6.png?resizew=187)
(1)求直线BD与平面ABC所成角的正弦值;
(2)求点E到平面BCD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d052663101ca930843abd98cbd61c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de19416fa3c38b1b82abf0937573f9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/6698ac67-aef7-4a6e-b2a1-8c87efe92cb6.png?resizew=187)
(1)求直线BD与平面ABC所成角的正弦值;
(2)求点E到平面BCD的距离.
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名校
3 . 如图四边形ABCD是边长为3的正方形,DE⊥平面ABCD,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/ddd1f18a-082d-40c3-985b-bd1e6b59f15d.png?resizew=163)
(1)求证:AC⊥平面BDE;
(2)若BE与平面ABCD所成角为
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5852b8f3ecf394b98074432eafafbf84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/ddd1f18a-082d-40c3-985b-bd1e6b59f15d.png?resizew=163)
(1)求证:AC⊥平面BDE;
(2)若BE与平面ABCD所成角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f717b7d4d0978eec7330afec554c078.png)
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2022-12-18更新
|
621次组卷
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5卷引用:吉林省四平市第一高级中学2019-2020学年高二上学期期中考试数学(理)试题
名校
4 . 如图,在多面体ABCDE中,平面ABCD⊥平面ABE,AD⊥AB,
,
,AB=AD=AE=2BC=2,F是AE的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/8eeaf36b-1361-4822-9905-1b6d005ba2a4.png?resizew=171)
(1)证明:
平面CDE;
(2)求平面ABCD与平面CDE的夹角余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daee939979849ab35efd299ce762a7bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/8eeaf36b-1361-4822-9905-1b6d005ba2a4.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
(2)求平面ABCD与平面CDE的夹角余弦值.
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5 . 如图,在四棱锥
中,底面ABCD为矩形,
平面PAD,E是AD的中点,
为等腰直角三角形,
,
.
;
(2)求PC与平面PBE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1676715fa1188b716cc945be7b94e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af62a8c94bdc27efa2ec03e58d9400ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d31767eb718a0327eca546fe6a189cb.png)
(2)求PC与平面PBE所成角的正弦值.
您最近一年使用:0次
2022-09-28更新
|
602次组卷
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8卷引用:吉林省四平市第一高级中学2023-2024学年高二上学期期初验收考试数学试题
吉林省四平市第一高级中学2023-2024学年高二上学期期初验收考试数学试题河南省豫北名校2022-2023学年高二上学期9月教学质量检测数学试题湖南省益阳市2022-2023学年高二上学期10月联考数学试题河南省郑州市新密市第一高级中学2022-2023学年高二上学期10月月考数学试题河南省平顶山市叶县高级中学2023-2024学年高二上学期10月月考数学试题广东省深圳市深圳外国语学校2023-2024学年高二上学期10月月考数学试题山西省朔州市怀仁市第一中学校2023-2024学年高二上学期第三次月考(11月)数学试题河南省新乡市获嘉县第一中学2023-2024学年高二上学期第一次月考数学试题
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6 . 在多面体
中,平面
平面ABCD,EDCF是面积为
的矩形,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/8/26/3052759954268160/3053455803826176/STEM/4563ea97675a45c8bdfc6abaffa26254.png?resizew=203)
(1)证明:
.
(2)求平面EDCF与平面EAB夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fc1129846f37afdafd751627c450d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ea464a0929a33bedd2ee95cdb66ba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3402ea855e2ae2dcd98f607bef4fdd6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a75b1354b8b783a65ee5e3bc596a976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/2022/8/26/3052759954268160/3053455803826176/STEM/4563ea97675a45c8bdfc6abaffa26254.png?resizew=203)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cade9d1bac990f2014ff8310613e2613.png)
(2)求平面EDCF与平面EAB夹角的余弦值.
您最近一年使用:0次
2022-08-27更新
|
453次组卷
|
7卷引用:吉林省四平市第一高级中学2022-2023学年高三上学期开学考试数学试题
名校
解题方法
7 . 如图,正方形
与梯形
所在的平面互相垂直,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67be899bc131ec1b9921ae9787c40d5.png)
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901470956732416/2902160536109056/STEM/f46f5f9e-2822-4dc1-8f1b-416f64cdfc40.png?resizew=206)
(1)求证:平面
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67be899bc131ec1b9921ae9787c40d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedd5a3ba0bba22992b705691d170b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4893a03cee7c73414be878cbc81cb5c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901470956732416/2902160536109056/STEM/f46f5f9e-2822-4dc1-8f1b-416f64cdfc40.png?resizew=206)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1187c376c891700e37afdcb15d3b63de.png)
您最近一年使用:0次
2022-01-25更新
|
568次组卷
|
2卷引用:吉林省四平市第一高级中学2021-2022学年高三上学期期末考试数学(理)试题
名校
8 . 如图,三棱柱
的所有棱长都是
,
平面
,
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896654029594624/2897194226999296/STEM/49cc372b-1075-4bfe-80e2-9bebbf205e65.png?resizew=202)
(1)证明:直线
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896654029594624/2897194226999296/STEM/49cc372b-1075-4bfe-80e2-9bebbf205e65.png?resizew=202)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
您最近一年使用:0次
2022-01-18更新
|
585次组卷
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5卷引用:吉林省四平市第一高级中学2021-2022学年高二上学期期末数学试题
名校
解题方法
9 . 如图四边形ABCD,
,
.现将
沿BD折起,当平面ABD与平面BDC垂直时,直线AB与CD所成角的余弦值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/dcf05d82-aafa-4eff-9f6f-a4d27da94da7.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cda253ab77e4f92ecbbcb7da292e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503c035fc57fb25aede1445af9aa2747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/dcf05d82-aafa-4eff-9f6f-a4d27da94da7.png?resizew=172)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-11-08更新
|
337次组卷
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3卷引用:吉林省四平市普通高中2021-2022学年高二上学期期中考试数学试题
名校
10 . 如图,在三棱柱
中,
底面
,D为
的中点,点P为棱
上的动点(不包括端点),
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825589920301056/2832545602781184/STEM/677237cd548b4f2a9bcf105dae5516fa.png?resizew=166)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae8a050d7159d4296c2409e5bc0bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825589920301056/2832545602781184/STEM/677237cd548b4f2a9bcf105dae5516fa.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2021-10-19更新
|
368次组卷
|
3卷引用:吉林省四平市第一高级中学2021-2022学年高二上学期10月月考数学试题
吉林省四平市第一高级中学2021-2022学年高二上学期10月月考数学试题山西省大同市新世纪中学2021-2022学年高二上学期第一次月考数学试题(已下线)河南省南阳市2022-2023学年高三上学期期末数学(理)试题变式题16-20