2024高三·全国·专题练习
1 . 在长方体
中,点E、F分别在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/7205f7cf-3567-4c34-9af8-2656a150cc52.png?resizew=152)
(1)求证:
平面
.
(2)若规定两个平面所成的角是这两个平面所组成的二面角中的锐角(或直角),则在空间中有定理:若两条直线分别垂直于两个平面,则这两条直线所成的角与这两个平面所成的角相等.试根据上述定理,在
,
,
时,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d942e5e9b5028abb317445e1ebdba8fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93df7ae545875597289d00fbb78f16ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/7205f7cf-3567-4c34-9af8-2656a150cc52.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)若规定两个平面所成的角是这两个平面所组成的二面角中的锐角(或直角),则在空间中有定理:若两条直线分别垂直于两个平面,则这两条直线所成的角与这两个平面所成的角相等.试根据上述定理,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3e58edd1f900ca82bb2a3058293f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab6bf42c7db96104456424e4d1be6c48.png)
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2024高三·全国·专题练习
解题方法
2 . 如图1,
平面
是
的一条斜线,
是
在平面
内的射影,
为斜线和平面所成的角.设
,过
作
的垂线
,连结
,则
,且
即为二面角
的平面角(锐二面角),设
.请推导关于
的等式关系(1);关于
的等式关系(2).并用上述两结论求解下题:如图2,设
和
所在的两个平面互相垂直,且
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3c21c5c5a703739d8e9f0d06cb239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44b1a23b38849ada376a8d0325deb3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f02721b8bcceb8a2098006614b8f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17fa4cf225a7479873ebb6bf115b0957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb62f9c6eb81238d329fbc50408a30d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5218deef31df5b193fb1313816ffac9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998d6f49e7854c9bdfd7a2cd87accc96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f523c7a1677bd402e80b20c8c99615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6089b9d8b7eab60df35ae5220dfffcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/312afce3-1dfd-456e-8da3-4d361ade3827.png?resizew=292)
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解题方法
3 . 在如图所示的四棱锥P
ABCD中,已知
,
,
,
是正三角形,点M在侧棱PB上且使得
平面
.
;
(2)若侧面
底面
,
与底面
所成角的正切值为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e45b6f8cf0260912f587c04f9f2442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1161e0345b3646c71365430dccbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1d19f4fc516351761ea159a7cc302d.png)
(2)若侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cbce64bc1b810c5a1f48799eefc8351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
您最近一年使用:0次
4 . 如图1,已知正方形
的中心为
,边长为
分别为
的中点,从中截去小正方形
,将梯形
沿
折起,使平面
平面
,得到图2.
平面
;
(2)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd47f92c374cfcf7010ea0d421210580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630754333e7043c573d0ecdb64cf1246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99dcd0afaef9dc32697c8bc480b1fd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc61a86aa346c6c4b37cf60c0ea07d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40cbcf7b3bc282c656e1f266a12ee32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c9b06cf3913c7e81a8ea88a8836714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7e1bac4fc939a3af4dd3601617798d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb86687f6014ddc386829090a3e7ae4.png)
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2024-04-03更新
|
351次组卷
|
5卷引用:河南省青桐鸣联考2023-2024学年高二下学期3月月考数学试题
河南省青桐鸣联考2023-2024学年高二下学期3月月考数学试题河南省青桐鸣联考2023-2024学年高二下学期3月月考数学试题(北师大版)(已下线)专题13.5空间平面与平面的位置关系-重难点突破及混淆易错规避(苏教版2019必修第二册)陕西省西安市高新第一中学2023-2024学年高一下学期第二次月考数学试题(已下线)专题20 平面与平面的位置关系-《重难点题型·高分突破》(苏教版2019必修第二册)
名校
5 . 如图,在四棱锥
中,四边形
为梯形,其中
,
,
,平面
平面
.
;
(2)若
,且
与平面
所成角的正切值为2,求平面
与平面
所成二面角的余弦值.
![](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/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2d5ab801f2a84b78139b0ea2c5032b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b8e49d68afab33806a63d25a0861c7c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c583493109d50c9e4634c05e9042a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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2024-04-03更新
|
1304次组卷
|
4卷引用:模型3 用定量+定性双法分析立体几何中的求角问题模型(高中数学模型大归纳)
(已下线)模型3 用定量+定性双法分析立体几何中的求角问题模型(高中数学模型大归纳)福建省莆田第一中学2023-2024学年高二下学期3月月考数学试卷江苏省盐城市东台市安丰中学等六校2024届高三下学期4月联考数学试题(已下线)专题01 空间向量与立体几何解答题必考题型(6类题型)-备战2023-2024学年高二数学下学期期末真题分类汇编(江苏专用)
6 . 已知四棱锥
的棱
的长为
,其余各条棱长均为1.
(1)求四棱锥
的体积;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
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2024高三·全国·专题练习
解题方法
7 . 正三棱锥
的侧面与底面所成的二面角为
,相邻侧面所成的二面角为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.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/4751cf603392fadc3f3eaed4f923bf4b.png)
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8 . 如图,在四棱锥
中,
底面
,
,
,
,E为PC的中点,
.则下列判断正确的是( )
![](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/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ecc88bb6ae24463b913114cce296a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/9565f24d-f4d8-4dac-8f9b-64c8077f9fe4.png?resizew=174)
A.面![]() ![]() | B.![]() |
C.二面角![]() ![]() | D.二面角![]() ![]() |
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2024高三·全国·专题练习
解题方法
9 . 单位正方体
中,
,
,AD的中点分别为E,F,G,求截面EFG与下底面ABCD所成二面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
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10 . 如图,菱形ABCD的对角线AC与BD交于点O,EF是
的中位线,AC与EF交于点G,已知
是
绕EF旋转过程中的一个图形,且
.给出下列结论:
平面
;
②平面
平面
;
③二面角
的平面角是直线OP与平面ABCD所成角的2倍.
其中所有正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e047b07e4609bea2232e2cbe8435940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debdc6632a4877e5131d3da25cda8b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
②平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
③二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f8c417f5c19cc076dc6baeb0c173a9.png)
其中所有正确结论的序号为( )
A.①②③ | B.①② | C.①③ | D.②③ |
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2024-03-27更新
|
648次组卷
|
4卷引用:四川省遂宁市2024届高三第二次诊断性考试数学(理)试题
四川省遂宁市2024届高三第二次诊断性考试数学(理)试题四川省雅安市2024届高三下学期二诊数学(理)试题四川省乐山市2024届高三第二次调查研究考试数学(理科)试题(已下线)第13章 立体几何初步(提升卷)-重难点突破及混淆易错规避(苏教版2019必修第二册)