名校
1 . 若
是平面
的一个法向量,
是平面
的一个法向量,
,
是直线
上不同的两点,则以下命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6279e798012e2a206f7de3dc7f73c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e506b6d8009cfc1e7847168418f1398e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() |
B.![]() |
C.![]() ![]() |
D.设![]() ![]() ![]() ![]() |
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2 . 如图,ABCD为圆柱
的轴截面,P为底面半圆周上一点,E为PC中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/42982c46-1cf2-4077-aa83-a73e0946f055.jpg?resizew=169)
(1)求证:
;
(2)若
,求平面PAD与平面ABE所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/42982c46-1cf2-4077-aa83-a73e0946f055.jpg?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c94ff4614059e5e91ed304b150d886.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f35b3fcb8c06368e2775ffc416158ba.png)
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3 . 如图,在四棱锥
中,底面
是矩形,
平面
于点M连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/a3bd4737-e139-40f6-8535-c7501599708d.png?resizew=154)
(1)求证:
平面
;
(2)求平面
与平面
所成角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636785de7e13f02830cc7b24a4571324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/a3bd4737-e139-40f6-8535-c7501599708d.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf2bc3dd1f1ae5d5e28b0366f454ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
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解题方法
4 . 已知在四棱锥
中,
平面
,底面
是边长为4的正方形,
,E为棱
的中点,则直线
与平面
所成角的正弦值为( )
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19f0fcacac715a1200770516d1e4a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2卷引用:山东省淄博实验中学2021-2022学年高二下学期开学考试数学试题
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解题方法
5 . 已知正方体
的棱长为2,P,Q分别为棱
,
的中点,M为线段BD上的动点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/1a1d801b-08f1-4485-9cb4-eb41af0b66c4.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/1a1d801b-08f1-4485-9cb4-eb41af0b66c4.png?resizew=166)
A.![]() |
B.![]() |
C.三棱锥![]() |
D.M为BD的中点时,则二面角![]() |
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解题方法
6 . 如图,在直棱柱
中,
,则异面直线
与
所成角的余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9aa1bbe83078714076536702dc8345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897048863039488/2904786634801152/STEM/765b5b52-fdf2-4ffa-9790-13f2b7d488ad.png?resizew=151)
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解题方法
7 . 如图,在四棱锥
中,
平面ABCD,
,
,
,
是等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/6f778109-4eaf-4ac0-9f50-a2e8d50503c3.png?resizew=210)
(1)证明:平面
平面PCD;
(2)求二面角
的余弦值.
![](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/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/6f778109-4eaf-4ac0-9f50-a2e8d50503c3.png?resizew=210)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
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2022-01-27更新
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8 . 三棱柱
中,侧棱与底面垂直,
,
,M,N分别是AB,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/4a3920c7-3f2d-46f1-927c-1c48c4272e40.png?resizew=156)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
;
(2)求直线
和平面
的夹角正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b51da47ab8433342f7a319e412fefae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/4a3920c7-3f2d-46f1-927c-1c48c4272e40.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.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/e67d36d29ac86703724d98da567659ec.png)
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9 . 如图1,在平行四边形
中,
,
,
,以对角线
为折痕把
折起,使点
到图2所示点
的位置,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/33562d2d-ff15-4cad-bc47-7278b812c60e.png?resizew=254)
(Ⅰ)求证:平面
平面
;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ad66112b09c909cab417085702ec00.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/33562d2d-ff15-4cad-bc47-7278b812c60e.png?resizew=254)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d07f36efcb9d203267d7c0409720cf.png)
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2019-01-09更新
|
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解题方法
10 . 如图,四边形ABCD与BDEF均为菱形,∠DAB=∠DBF=60°,且FA=FC.
![](https://img.xkw.com/dksih/QBM/2017/8/31/1763862367150080/1766216690229248/STEM/8c5ac5cd02ee45839bd0179a74d3b66e.png?resizew=177)
(Ⅰ)求证:AC⊥平面BDEF;
(Ⅱ)求证:FC∥平面EAD;
(Ⅲ)求二面角A﹣FC﹣B的余弦值.
![](https://img.xkw.com/dksih/QBM/2017/8/31/1763862367150080/1766216690229248/STEM/8c5ac5cd02ee45839bd0179a74d3b66e.png?resizew=177)
(Ⅰ)求证:AC⊥平面BDEF;
(Ⅱ)求证:FC∥平面EAD;
(Ⅲ)求二面角A﹣FC﹣B的余弦值.
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|
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