1 . 如图,在斜三棱柱
中,
,等腰
的斜边
,
在底面ABC上的投影恰为AC的中点.
(1)求二面角
的正弦值;
(2)求
的长;
(3)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2befa96c33901247429a833c46eb193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/9639bf81-f6cc-4914-a8e9-c5087f16e8ab.png?resizew=207)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e40655af09f2c9eb619a501ce32e63b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
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解题方法
2 . 如图,在三棱柱
中,侧面
为正方形,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/a9ebcb49-b4d4-4662-a91d-f07d324ab9b9.png?resizew=163)
(1)求证:
//平面
;
(2)再从条件(1)、条件(2)这两个条件中选择一个作为已知,求二面角
的平面角的余弦值.
条件①:
平面
;
条件②:
.
注:如果选择条件①和条件②分别解答,按第一个解答计分.
![](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/6324ce775441d6748a6ffd2a9991e79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a82cc423019f1d9eead676d081d516b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/a9ebcb49-b4d4-4662-a91d-f07d324ab9b9.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)再从条件(1)、条件(2)这两个条件中选择一个作为已知,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8272b83ae3abd32b9503a7425b3e5c62.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6da9f598fecf6fcf41cd65b45cbe08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf9d13845b414026c6810e845b9efdb.png)
注:如果选择条件①和条件②分别解答,按第一个解答计分.
您最近一年使用:0次
名校
解题方法
3 . 如图所示,在三棱锥
中,
,
.
(1)求二面角
的余弦值;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c69fe04c66daf239022c0ea4957d38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/333b30c5-4b53-40ba-820f-8bd6e3c8d0ab.png?resizew=136)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2023-07-08更新
|
284次组卷
|
3卷引用:四川省南充市嘉陵第一中学2023-2024学年高二上学期10月月考数学试题
名校
解题方法
4 . 如图,ABDC是平面四边形,
为正三角形,
,
.将
沿BC翻折,过点A作平面BCD的垂线,垂足为H.
(2)若点H在BCD内部,且直线AB与平面ACD所成角的正弦值为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f2b1e0f812dabeda280d82b1eaa00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若点H在BCD内部,且直线AB与平面ACD所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dedfba8b9447a4db53baae62fdeebfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec2524be492bca0d1566bf848066f10.png)
您最近一年使用:0次
2023-07-07更新
|
363次组卷
|
3卷引用:四川省成都外国语学校2023-2024学年高二上学期9月月考数学试题
5 . 如图,直四棱柱
中,底面
为矩形,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8bcc4264dcb354a0566c20774367c5.png)
与平面
所成的角的大小;
(2)求二面角
的余弦值;
(3)求直线
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8bcc4264dcb354a0566c20774367c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6664b1172f9b53c6424526a41b39703.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77fb7b9b35265b3eab89a01339a1061.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
您最近一年使用:0次
名校
6 . 如图,四棱锥
的底面
是菱形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/2ef2ae64-cd25-49be-9072-599f43489362.png?resizew=181)
(1)求证:
平面PBD;
(2)若E为
的中点,求二面角
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/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ff87102c14ae8c4c99c825ecf7d9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5a86745bfe1dfe7bc2683811210330.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/2ef2ae64-cd25-49be-9072-599f43489362.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
(2)若E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5617a404c5a3356753136e5a6b6d51e5.png)
您最近一年使用:0次
名校
7 . 如图,在四棱锥
中,
,
,
,
,
.
时,求直线
与平面
所成角的大小;
(2)当二面角
为
时,求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1387a262fa090afe51656734c3422bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7ff7cf4d7094bc927e959157ef1b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a351d71fa01d3f5920e374a8ee7b524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2023-06-30更新
|
1197次组卷
|
8卷引用:四川省内江市第二中学2023-2024学年高二上学期12月月考数学试题
四川省内江市第二中学2023-2024学年高二上学期12月月考数学试题江苏省苏州市2022-2023学年高一下学期期末学业质量阳光指标调研数学试题(已下线)模块二 专题5《立体几何初步》单元检测篇 A基础卷 (苏教版)(已下线)第五篇 向量与几何 专题17 三正弦定理、三余弦定理 微点1 三正弦定理、三余弦定理上海市杨浦高级中学2023-2024学年高三上学期11月期中考试数学试卷(已下线)第二章 立体几何中的计算 专题一 空间角 微点11 三正弦定理与三余弦定理(一)【培优版】陕西省西安市铁一中学国际部2023-2024学年高一下学期第三月考数学试题(已下线)专题3 由二面角求线段长问题(解答题一题多解)
名校
8 . 在《九章算术·商功》中,将四个面都是直角三角形的三棱锥称为“鳖臑”.如图,现将一矩形
沿着对角线
将
折成
,且点
在平面
内的投影
在线段
上.已知
.
(1)证明:三棱锥
为鳖臑;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c79e56bc6f1db8f446fc5bd34a08865.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/30/3c556c81-9ee4-4e7d-9ff7-f6940fd1b462.png?resizew=303)
(1)证明:三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a7ba7cd0c654714c967a900513ba16.png)
您最近一年使用:0次
名校
9 . 如图,在等腰梯形ABCD中,
.将△ACD沿着AC翻折,使得点D到点P,且
.下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d358d2e6ad3dcde7d50fc3ccae7eaf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbad7ad1465d1c4c177e3321e6ed12a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/239fde26-c3b0-45bf-9616-e0a827030992.png?resizew=295)
A.平面APC⊥平面ABC |
B.二面角![]() ![]() |
C.三棱锥![]() |
D.点C到平面APB的距离为![]() |
您最近一年使用:0次
2023-06-09更新
|
533次组卷
|
5卷引用:四川省乐山市金口河区延风中学2023-2024学年高二上学期9月月考数学试题
名校
10 . 在图1中,
为等腰直角三角形,
,
,
为等边三角形,O为AC边的中点,E在BC边上,且
,沿AC将
进行折叠,使点D运动到点F的位置,如图2,连接FO,FB,FE,使得
.
(1)证明:
平面
.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de01ca42a21f0cb44b2c914e092a0d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7de22c9c2e5697ba8bc9b79621b71a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/57954b28-b47c-4b9d-b8e9-d8d0ecbf4d09.png?resizew=330)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/befd9ccddb75aeb71cd1a008669f34da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7289950468c026d5ceac17a79334dfe9.png)
您最近一年使用:0次
2023-06-03更新
|
1639次组卷
|
12卷引用:四川省成都市田家炳中学2024届高三第一次月考理科数学试题
四川省成都市田家炳中学2024届高三第一次月考理科数学试题四川省乐山市金口河区延风中学2024年高三上学期9月月考数学(理科)试题四川省广安市新育才教育集团2023-2024学年高二上学期10月月考数学试题湖南省普通高中2023届高三高考前模拟数学试题河南省部分名校2022-2023学年高三下学期5月联考理科数学试卷江苏省南京市励志高级中学2022-2023学年高二下学期期末数学试题贵州省贵阳市观山湖区第一高级中学2022-2023学年高二下学期第二次月考数学试题湖南省衡阳市第八中学2023-2024学年高三上学期10月第二次月考数学试题(已下线)重难点突破02 利用传统方法求线线角、线面角、二面角与距离(四大题型)(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-1福建省建瓯市芝华中学2023-2024学年高二上学期期中考试数学试题(已下线)重难点12 立体几何必考经典解答题全归类【九大题型】