1 . 在正三棱台
中,侧棱长为1,且
,
,
分别为
,
的中点,且
.
(1)证明:
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5825e3891ce507d4af2e0d9d1a0b74b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ea6ce533bd6f40967e6bee24c2b94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/52628342-cbd4-4e3b-b444-7f26c55bdc79.png?resizew=149)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2 . 如图1,在直角梯形
中,
分别为
的中点,沿
将平面
折起,使二面角
的大小为
,如图2所示,设
分别为
的中点,
为线段
上的动点(不包括端点).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/df14bad5-c4d9-4c33-a87c-420d53d397de.png?resizew=277)
(1)求证:
;
(2)若直线
与平面
所成角的正弦值是
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937ffb8f3a3dbb7396e188b1fa1f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69856a547e733af483753a1dc51f47bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39ee40b5a17a31195e83ec5f8e0b819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/df14bad5-c4d9-4c33-a87c-420d53d397de.png?resizew=277)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d7650a6679da9676f6d92654d2d6ef.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5391d00655e9e4ee30fe9934b2f02c.png)
您最近一年使用:0次
3 . 如图,四棱锥
中,底面
是边长为2的菱形,
,平面
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/dc5ba22d-a365-4743-b2d9-94a4a0eef166.png?resizew=170)
(1)求证:
;
(2)若
,且四棱锥
的体积为2,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfcf34539673d516eb9b259951a81ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105542c7be8212337a677a92851dc8b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/dc5ba22d-a365-4743-b2d9-94a4a0eef166.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf8f9303c09efc2c1b0cb798f9dfc6f7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3f74153816d0a7733bc9c91282e75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfcf34539673d516eb9b259951a81ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a392d05d3cfcbb438569b1ea9980dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f526e2fe627bb4ddebe708c07d0a22fc.png)
您最近一年使用:0次
4 . 如图(1)所示
中,
,
.
分别为
中点.将
沿
向平面
上方翻折至图(2)所示的位置,使得
.连接
得到四棱锥
.记
的中点为
,连接
.
平面
;
(2)点
在线段
上且
,连接
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d390782b8ea7016628ee68403dcbfbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1d18e7acbf1db4243914a885261ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d240ea67c239b0d9213448c11cba18c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9742fb0549cb89e808d50e81bcef49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bb1063e139610045f3bca5ca0b2766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c25c4259d935d6e6fabe5c3fc1f43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef77cfa13de39e9ef424e386f84056e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6592783d1f83c37b051221a7a3a17d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f947fd286e0c37fdcc8d1b6ce4295c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2024-02-17更新
|
750次组卷
|
5卷引用:山东省济南市2023-2024学年高二上学期1月期末质量检测数学试题
山东省济南市2023-2024学年高二上学期1月期末质量检测数学试题山东省临沂市第十九中学2023-2024学年高二下学期第一次质量调研考试数学试题2024届高三新改革数学模拟预测训练四(九省联考题型)(已下线)模块4 二模重组卷 第2套 复盘卷(已下线)湖北省武汉市(武汉六中)部分重点中学2024届高三第二次联考数学试题变式题17-22
解题方法
5 . 已知函数
的部分图象如图所示,A,B分别为图象的最低点和最高点,过A,B作x轴的垂线分别交x轴于点
,
.将画有该图象的纸片沿着x轴折成120°的二面角
,此时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b998f232a34711a14a99116248495526.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc031fac0d7660c9d7d3dbb7f53a284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a6b3451a518c3da8957f6cc2fe7654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b998f232a34711a14a99116248495526.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/c00d7b10-4c43-41f3-b1ae-b916a9e23316.png?resizew=154)
您最近一年使用:0次
6 . 如图,在直三棱柱
中,
,
,
,
,
分别为
,
的中点.
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b935580f6c20b82112df78d570a482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade68d3f913ba0357f38a808392f5820.png)
您最近一年使用:0次
2024-01-26更新
|
359次组卷
|
5卷引用:山东省德州市夏津育中万隆中英文高级中学2023-2024学年高一下学期5月月考数学试题
山东省德州市夏津育中万隆中英文高级中学2023-2024学年高一下学期5月月考数学试题陕西省汉中市汉台区2024届高三上学期第四次校际联考数学(文)试题(已下线)专题01 高一下期末真题精选(2)-期末考点大串讲(人教A版2019必修第二册)(已下线)专题08 立体几何异面直线所成角、线面角、面面角及平行和垂直的证明 -《期末真题分类汇编》(北师大版(2019))(已下线)专题08 期末必刷解答题专题训练的7种常考题型归类-期末真题分类汇编(北师大版2019必修第二册)
名校
7 . 已知直四棱柱
的所有棱长均为4,
,以
为球心,
为半径的球面与侧面
的交线长为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
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2024-01-19更新
|
1042次组卷
|
5卷引用:山东省滨州市2024届高三上学期期末数学试题
山东省滨州市2024届高三上学期期末数学试题(已下线)重难点6-2 空间几何体的交线与截面问题(8题型+满分技巧+限时检测)2024年新高考模拟卷数学试题(九省联考题型)(已下线)第18讲 第八章 立体几何初步 章节验收测评卷-【帮课堂】(人教A版2019必修第二册)湖南省长沙市第一中学2024届高三下学期高考适应性演练(二)数学试卷
名校
8 . 如图,四棱锥P-ABCD中,
,
,
,平面
平面PAC.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/9b10f345-c7e6-4aae-9c17-86bb6d1b2bdb.png?resizew=166)
(1)证明:
;
(2)若
,
是
的中点,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0642d7f4f43b9d65aa8cb45157e6ef12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/9b10f345-c7e6-4aae-9c17-86bb6d1b2bdb.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e4b16c2c6c9bd089da78122e9d2511.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ece472b33e9c4be953068aa18724df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2730b513bd3359c3dfe6567e04f5ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2024-01-18更新
|
1119次组卷
|
3卷引用:山东省济南市2024届高三上学期期末学习质量检测数学试题
名校
9 . 如图,AB是半球O的直径,
,
依次是底面
上的两个三等分点,P是半球面上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/6084a5c9-e97c-4363-a126-ab4778e81a6b.png?resizew=170)
(1)证明:
;
(2)若点
在底面圆上的射影为
中点,求直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fa06464d2e58b414c503be9bcc711e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/6084a5c9-e97c-4363-a126-ab4778e81a6b.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b605b730f0e1d7b26eb1910d8619.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2024-01-18更新
|
2411次组卷
|
7卷引用:山东省淄博市2024届高三上学期摸底质量检测数学试题
山东省淄博市2024届高三上学期摸底质量检测数学试题江西省抚州市临川第一中学2024届高三“九省联考”考后适应性测试数学试题(一)河南省郑州市郑州外国语学校2024届高三上学期适应性训练数学试题(已下线)第5讲:立体几何中的动态问题【练】海南省海南中学2023-2024学年高三上学期第6次月考数学试题(已下线)黄金卷05(2024新题型)(已下线)微考点5-2 新高考新试卷结构立体几何解答题中与旋转体有关的问题
名校
10 . 如图,在四棱锥
中,
平面
,
与底面
所成的角为
,底面
为直角梯形,
,点
为棱
上一点,满足
,下列结论正确的是( )
![](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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a00b886ec3b94ea65a7cc370f3b38232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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A.平面![]() ![]() |
B.在棱![]() ![]() ![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.点![]() ![]() ![]() |
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2024-01-18更新
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6卷引用:山东省济南市山东实验中学2024届高三上学期第一次模拟测试数学试题
山东省济南市山东实验中学2024届高三上学期第一次模拟测试数学试题宁夏吴忠市吴忠中学2023-2024学年高二上学期期末数学试题(已下线)第5讲:立体几何中的动态问题【练】(已下线)第18讲 第八章 立体几何初步 章节验收测评卷-【帮课堂】(人教A版2019必修第二册)(已下线)专题04 立体几何(已下线)13.2.4 平面与平面的位置关系(2)-【帮课堂】(苏教版2019必修第二册)