名校
1 . 如图,在三棱锥
中,
平面
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91ac38719ac70e0597a72e7f0deceac.png)
.
(1)求点
到平面
的距离;
(2)设点
为线段
的中点,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0595498034037b58538f8056dbc6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91ac38719ac70e0597a72e7f0deceac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd516e4b396722941982a389ee6e524c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/a1dcce74-de00-4502-b86e-200dd621794c.png?resizew=109)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0f73cf7ab0c2a8a0099cb2873c81f4.png)
您最近一年使用:0次
名校
2 . 如图,已知正方体
的棱长为1,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/27/ff345f42-b874-4719-9de8-258a76019d50.png?resizew=172)
A.![]() |
B.![]() ![]() |
C.平面![]() ![]() ![]() |
D.点![]() ![]() ![]() |
您最近一年使用:0次
2023-09-27更新
|
372次组卷
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4卷引用:云南省红河哈尼族彝族自治州第一中学2023-2024学年高二上学期10月月考数学试题
名校
3 . 如图,已知在三棱柱
中,平面
平面
,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/25/a221d757-b6c7-4110-b295-9b07ed8b0cb8.png?resizew=151)
(1)证明:
平面
;
(2)若
,
,
,
分别为
,
的中点,
,
,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f4d9c3f1e496cc3fa3401ffaedd7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcfe69b939fd1c271747fe9d37ccdf9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/25/a221d757-b6c7-4110-b295-9b07ed8b0cb8.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d97e150793ad48c641db0cc74aaa341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4f0c1c9cca0555906d8a53e1a6803d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657d5471e57b894c3833bb3f43ff38ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea0df817e3e2cd95b9cd8f73386834c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcb4ac0912b7d7a1dbf6107d30a41f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1fc5de1aa6c80c8bbb390adc620543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
您最近一年使用:0次
2023-08-24更新
|
673次组卷
|
2卷引用:云南师范大学附属中学2024届高三高考适应性月考卷(二)数学试题
4 . 如图,在四棱锥
中,
平面
是等边三角形,
.
(1)求证:平面
平面
;
(2)求平面
与平面
夹角的余弦值.
![](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/29a122faf99854b5d548d9bee12bd0ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7b6d04f024ca05cdfacc8ce9137c15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/2aff95d8-e331-4ec3-a35c-661afb0fe250.png?resizew=159)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2023-08-23更新
|
895次组卷
|
2卷引用:云南省保山市2021-2022学年高二下学期期末质量监测数学试题
名校
5 . 如图,在正方体
中,
分别为
的中点.
平面
;
(2)若正方体的棱长为4,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c644bd04a5e0d6ed487daa39bbcf4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad25d7eab7ecc7d46c19187adb9dc16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
(2)若正方体的棱长为4,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef30620deef1165d60bd5d0dade9145.png)
您最近一年使用:0次
2023-08-22更新
|
421次组卷
|
3卷引用:云南省保山市腾冲市2022-2023学年高一下学期期中教育教学质量监测数学试题
云南省保山市腾冲市2022-2023学年高一下学期期中教育教学质量监测数学试题上海市松江二中2024届高三上学期阶段测试1数学试题(已下线)重难点专题14 利用传统方法解决二面角问题-【帮课堂】(苏教版2019必修第二册)
6 . 如图,三棱锥
的底面
是等腰直角三角形,其中
,平面
平面ABC,点E,N分别是AB,BC的中点.
(1)证明:
平面PAB;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cfdccdbfecf078c1544ce2132aae1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/29/a77c4de1-b2c9-42a8-a71b-150688b4d9df.png?resizew=130)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa00966462971fe7856c033f8cb1b821.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850319b7098a23b859791d7da3e63e74.png)
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7 . 《九章算术》是我国古代数学名著,它在几何学中的研究比西方早一千多年,在《九章算术》中,将底面为直角三角形,且侧棱垂直于底面的三棱柱称为堑堵;阳马指底面为矩形,一侧棱垂直于底面的四棱锥;鳖臑指四个面均为直角三角形的四面体.如图,在堑堵
中,
,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e43944426841fe584065908f677b192.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/23/416e86ec-398f-41f8-a159-20df81472ec9.png?resizew=118)
A.四棱锥![]() |
B.三棱锥![]() |
C.当三棱锥![]() ![]() ![]() |
D.记四棱锥![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
8 . 如图,在四棱锥
中,平面
平面
,
,
,
,
.
(1)证明:
平面
.
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73ff18fab460a2bc8d21cc522527e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292d0b9ce587bd5df884a988c22ccba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd316249a2a4333a6e37ea6ba4c0e67b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71807a35b3170fce28ee6edf4c00d083.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/19/9465d634-9cb6-4c05-9a53-12796388787b.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
您最近一年使用:0次
2023-07-21更新
|
629次组卷
|
2卷引用:云南省曲靖市富源县2022-2023学年高二下学期5月月考数学试题
解题方法
9 . 在正三棱锥
中,
与底面
所成角的余弦值为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cda789b1acfae014684e1684522fbfe.png)
A.![]() |
B.三棱锥![]() ![]() |
C.二面角![]() ![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
2023-07-16更新
|
359次组卷
|
2卷引用:云南省楚雄州2022-2023学年高一下学期期末考试数学试题
解题方法
10 . 已知圆锥的顶点为
,底面圆心为
,
,底面半径为2,
,
是底面圆周上两点,且
,则二面角
的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6183ebae6c95c17a4e0ab017e12ae8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aae4a5d11436954ee799c4c6fc11aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9dce54b98dd08d5b026ea0a46119c0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次