名校
1 . 如图,在四棱锥
中,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380684146999372bf39f6893a30d57e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/e0a2b30f-a7c4-44f4-a37a-f2592c0e3e86.png?resizew=189)
(1)证明:
;
(2)求
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/03121c141fa171d95ec6c0e91ab21889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b218deaa35c7475751c6531ef77491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380684146999372bf39f6893a30d57e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/e0a2b30f-a7c4-44f4-a37a-f2592c0e3e86.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5ea309886e947ea7cb4b81716206fd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2 . 如图,已知三棱锥
中,平面
平面
,记二面角
的平面角为
,直线
与平面
所成角为
,直线
与平面
所成角为
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/bf2d1565-4352-4dfd-a9a7-acfeea57a638.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905e950cc8fc6f92f31c62c784cbbc26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/bf2d1565-4352-4dfd-a9a7-acfeea57a638.png?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
3 . 如图,已知点
是正方形
的边
上一动点(端点除外),现将
沿
所在直线翻折成
,并连接
,记二面角
的大小为
,则
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480277820293120/2480335827787776/STEM/dbd26b1b883b4e2fb1ec4c314c10dfe5.png?resizew=296)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438bf2134641f9950932bd667188d63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17575293fcce560441d44c82aeee7574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8267d832508d4bee00ff2d4a4bd2b6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0935b808b6941672b741b5fa6ac2e85d.png)
![](https://img.xkw.com/dksih/QBM/2020/6/8/2480277820293120/2480335827787776/STEM/dbd26b1b883b4e2fb1ec4c314c10dfe5.png?resizew=296)
A.存在![]() ![]() ![]() | B.存在![]() ![]() ![]() |
C.存在![]() ![]() ![]() | D.存在![]() ![]() ![]() |
您最近一年使用:0次
2020-06-08更新
|
227次组卷
|
2卷引用:浙江省湖州中学2020届高三下学期高考模拟测试(一)数学试题
4 . 如图,已知三棱锥
满足
,
在底面的投影
为
的外心,分别记直线
与平面
,
,
所成的角为
,
,
,则( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/493d7547-be52-48f3-b425-36e81397ae99.png?resizew=204)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad027e4a17389a50a9da8797084c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/493d7547-be52-48f3-b425-36e81397ae99.png?resizew=204)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
5 . 如图,在三棱柱中
,点
,
分别是
,
的中点,已知
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/1258b9dc-c3aa-4da6-9571-a8d8805306a5.png?resizew=229)
(1)求证:
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e219a4d3927218136116040bfe5cbaa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f4da89257f9bb399d8b9cd874b222b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/1258b9dc-c3aa-4da6-9571-a8d8805306a5.png?resizew=229)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cf187bc2ede965870b90757b495f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
您最近一年使用:0次
2020-02-16更新
|
428次组卷
|
4卷引用:2017届浙江省湖州、衢州、丽水三市高三4月联考数学试卷
6 . 如图,在四棱锥
中,底面
是边长为2的正方形,且
,平面
平面
,二面角
为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/6ae68866-fa06-40f0-9011-4d597bf6a7b4.png?resizew=127)
(Ⅰ)求证:
平面
;
(Ⅱ)求
与平面
所成角的正弦值.
![](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/490f0c21a0bfecc1447d54803af0b119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d76403bac26df50d934d93586f8a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/6ae68866-fa06-40f0-9011-4d597bf6a7b4.png?resizew=127)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
您最近一年使用:0次
7 . 已知三棱锥
中,
为正三角形,
,且
在底面
内的射影在
的内部(不包括边界),二面角
,二面角
,二面角
的大小分别为
,
,
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97778aa24ab08f82bffb1d3e7c489d2.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/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-04-18更新
|
1185次组卷
|
2卷引用:【校级联考】浙江省湖州三校2019年普通高等学校招生全国统一考试数学试题
名校
8 . 如图所示,在底面为正三角形的棱台
中,记锐二面角
的大小为
,锐二面角
的大小为
,锐二面角
的大小为
,若
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/542292c9-df62-40e3-b051-287e4d6f7ddb.png?resizew=142)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4ba2f1a35b1d92df3bd58d09856374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736ae59ea5f90a62103f2840b0a17b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd872ca511462e8b69fa0c03b1b2422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc593115461debf552cd5d9247e0f01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/542292c9-df62-40e3-b051-287e4d6f7ddb.png?resizew=142)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2019-03-13更新
|
582次组卷
|
3卷引用:浙江省湖州中学2020届高三下学期高考模拟测试(二)数学试题
浙江省湖州中学2020届高三下学期高考模拟测试(二)数学试题【校级联考】浙江省金华十校2019届高三上学期期末联考数学试题(已下线)卷02 空间向量与立体几何-单元检测(中)-2021-2022学年高二数学单元卷模拟(易中难)(2019人教A版选择性必修第一册+第二册)
9 . 如图,三棱柱
所有的棱长均为1,
.
![](https://img.xkw.com/dksih/QBM/2018/12/8/2092512640966656/2094040978153472/STEM/83c34ec2d57d4ca8be0ccd9fe4890900.png?resizew=186)
1
求证:
;
2
若
,求直线
和平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0238beea11a4fccb8d71e0dca96e21a.png)
![](https://img.xkw.com/dksih/QBM/2018/12/8/2092512640966656/2094040978153472/STEM/83c34ec2d57d4ca8be0ccd9fe4890900.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c36350b6a9239f9e9ac4fd65594f4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66384d82516050e91759940c7d3465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bebb9d0950db392cbe960641f648df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075e36592397038ffadf495e3e75bba1.png)
您最近一年使用:0次
2018-12-10更新
|
627次组卷
|
2卷引用:浙江省湖州市2018届高三下学期高考适应性考试数学试题
10 . 已知在矩形
中,
,沿直线BD将△ABD折成
,使得点
在平面
上的射影在
内(不含边界),设二面角
的大小为
,直线
,
与平面
中所成的角分别为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12813a857895073cba58f5107ba6112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2006284762c12b012a0274a0f049351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f150a3003923f43c558eced3ca565bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6591f5d23da9e2349295383d662761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed59820c4dacc2c93bbfcc32dbb302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24edeef3e1eca5a8659543549e909943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e027e5015e5412248ecce335b48df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba83980a38c5e1fe4be841bc8a51d1d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-11-10更新
|
286次组卷
|
10卷引用:2017届浙江省湖州、衢州、丽水三市高三4月联考数学试卷
2017届浙江省湖州、衢州、丽水三市高三4月联考数学试卷【全国百强校】浙江省杭州市学军中学2018年5月高三模拟考试数学试卷(已下线)2018年高考数学母题题源系列【浙江专版】专题八 点线面的位置关系与空间的角浙江省绍兴市诸暨市诸暨中学(实验班)2019-2020学年高二上学期期中数学试题浙江省杭州市学军中学2019-2020学年高三下学期4月月考数学试题浙江省绍兴市上虞区春晖中学2019-2020学年高二特长班上学期10月月考数学试题浙江省“七彩阳光”新高考研究联盟2020-2021学年高二上学期期中联考数学试题(已下线)【新东方】杭州新东方高中数学试卷382(已下线)【新东方】绍兴qw130浙江省温州市“十五校联合体”2018-2019学年高二上学期期中联考数学试题