1 . 如图,直角梯形
中,
,
,
,
,
底面
,
底面
且有
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/e33b186f-cc97-4b10-a54b-b7600c90b302.png?resizew=164)
(1)求证:
;
(2)若线段
的中点为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e320a45fdb0f3339eff27dd0c608117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503c035fc57fb25aede1445af9aa2747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f09ad78d4eccd1a9c9ccd3c4af79c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36f7e5128bcf12583792fe8a4a4d8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d728e2998c46902bbcf639e076fac1f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/e33b186f-cc97-4b10-a54b-b7600c90b302.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5232ca3c1e0ce4064d0094502aacb063.png)
(2)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
您最近一年使用:0次
2018-02-28更新
|
748次组卷
|
3卷引用:广东省六校联盟2020届高三下学期第四次联考数学(理)试题
2 . 如图所示,
矩形
所在的平面,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2018/2/1/1873186701623296/1874231475232768/STEM/5d7aa3e7e8f8432d9d856fe1e94c128b.png?resizew=185)
(1)求证:
平面
.
(2)
![](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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cca777c664ecc22e40dff4ccae6b248.png)
![](https://img.xkw.com/dksih/QBM/2018/2/1/1873186701623296/1874231475232768/STEM/5d7aa3e7e8f8432d9d856fe1e94c128b.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab384f2520d76ed8fa01b31e09c1eea.png)
您最近一年使用:0次
2018-02-03更新
|
995次组卷
|
12卷引用:广东省揭阳市第三中学2017-2018学年高一上学期期末考试数学试题
广东省揭阳市第三中学2017-2018学年高一上学期期末考试数学试题(已下线)2011-2012年河南省许昌市高一上学期期末测试数学(已下线)2011-2012学年山东省梁山二中高一12月份月考数学试卷2015-2016学年河北省邢台市二中高二上第一次月考数学试卷2015-2016学年福建省上杭一中高一上第二次月考数学试卷2016-2017学年河北省卓越联盟高二上学期月考一数学试卷江苏省镇江中学2020-2021学年高一下学期期末数学试题湖北省武汉市第四十九中2020-2021学年高一下学期5月月考数学试题(已下线)第11练 空间直线、平面的平行-2022年【暑假分层作业】高一数学(人教A版2019必修第二册)江苏省南京师范大学附属中学秦淮科技高中2022-2023学年高一下学期5月月考数学试题江苏省镇江第一中学、大港中学等八校2022-2023学年高一下学期5月月考数学试题江苏省南京市人民中学、海安市实验中学、句容市第三中学、镇江心湖高级中学2022-2023学年高一下学期5月学情调研数学试题
3 . 如图,在四棱锥
中,底面ABCD为菱形,
平面ABCD,
,
,E,F分别是BC,PC的中点.
Ⅰ
证明:
;
Ⅱ
设H为线段PD上的动点,若线段EH长的最小值为
,求直线PD与平面AEF所成的角的余弦值.
![](https://img.xkw.com/dksih/QBM/2019/4/15/2182905701556224/2184215223328768/STEM/7e7be49f58314a1bb3ebc2ad9eb45043.png?resizew=172)
![](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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304e9d63e7fdc531f4f7b805b765a1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2019/4/15/2182905701556224/2184215223328768/STEM/7e7be49f58314a1bb3ebc2ad9eb45043.png?resizew=172)
您最近一年使用:0次
2018-03-16更新
|
1600次组卷
|
7卷引用:广东省深圳市第九高级中学2018-2019学年高二上学期期中考试数学试题(理)
4 . 如图,四棱锥P﹣ABCD中,底面四边形ABCD是正方形,PA=AB=1,PA⊥平面ABCD,E为棱PB上一点,PD∥平面ACE,过E作PC的垂线,垂足为F.
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572592954769408/1572592960905216/STEM/9c8d38337abe4edea3fc175a52b5d3a4.png)
(Ⅰ)求证:PC⊥平面AEF;
(Ⅱ)求三棱锥P﹣AEF的体积.
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572592954769408/1572592960905216/STEM/9c8d38337abe4edea3fc175a52b5d3a4.png)
(Ⅰ)求证:PC⊥平面AEF;
(Ⅱ)求三棱锥P﹣AEF的体积.
您最近一年使用:0次
5 . 如图所示,在直三棱柱
中,
,
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/a360770cad0049318dc29dfdcee604cd.png)
(Ⅰ)求证:
;
(Ⅱ)求证:
.
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/fbef4db8d5aa423cbacb95006f89ae1e.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/50ecfc2a16a04fabba73e5b1af347b32.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/e7623c64bc4b41159bfe1cdfffdafbaf.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/5e052a2152af4d8bbecfe31c6b2aec84.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/ece7110146a040c6a825b421209f8244.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/bdf323d2e36649dabaf6e39394969b03.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/5627290e743141d89541ec5af569e78b.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/a360770cad0049318dc29dfdcee604cd.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/a44ac4711047478eae32b5ade1ca7f06.png)
(Ⅱ)求证:
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572200275312640/1572200281006080/STEM/ffb18a06fe65498f9409b0a42500bab6.png)
您最近一年使用:0次
6 . 长方体
中,
,
,点
为
中点.
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497781760/STEM/d9abb2855702425a8a8f1d28fd447987.png)
(Ⅰ)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
平面
;
(Ⅱ)求证:
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a53ecb573efb44465fa11b22f9198e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497781760/STEM/d9abb2855702425a8a8f1d28fd447987.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb8b9b4d0fded993bf8b618f0820407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
您最近一年使用:0次
7 . 如图,已知PA⊥⊙O所在的平面, AB是⊙O的直径,AB=2,C是⊙O上一点,且AC=BC=PA,E是PC的中点,F是PB的中点.
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572032055377920/1572032061259776/STEM/63436f5ac9e34b538fc2655e68edce4c.png)
(1)求证:EF//平面ABC;
(2)求证:EF⊥平面PAC;
(3)求三棱锥B—PAC的体积.
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572032055377920/1572032061259776/STEM/63436f5ac9e34b538fc2655e68edce4c.png)
(1)求证:EF//平面ABC;
(2)求证:EF⊥平面PAC;
(3)求三棱锥B—PAC的体积.
您最近一年使用:0次
2016-12-03更新
|
1015次组卷
|
2卷引用:2015届广东省肇庆市高中毕业班第一次统一检测文科数学试卷
8 . 如图,在五面体
中,四边形
是边长为
的正方形,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2014/4/28/1571679744958464/1571679750889472/STEM/2aefb6579d1e4894823827e914002c6f.png)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07b92b8282c7fd1158b3b5098e38c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d1b2f8e921264ebe993d8e36587e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6166b9a5437671bcba31e17c375eb39.png)
![](https://img.xkw.com/dksih/QBM/2014/4/28/1571679744958464/1571679750889472/STEM/2aefb6579d1e4894823827e914002c6f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbe3ec31a79a171dcf274ff99e50762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
2016-12-02更新
|
1757次组卷
|
3卷引用:2014届广东省广州市普通高中毕业班综合测试二理科数学试卷
9 . 已知如图正四面体
的侧面积为
,
为底面正三角形
的中心.
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/c9f16c7051e0464b93334e327ca18519.png)
(1)求证:
;
(2)求点
到侧面
的距离.
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/7e67463512724d7cbd29218e5705b4ad.png)
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/8e6e21a97fa447b0872c6c22258b575e.png)
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/913e5e17d6d94847b9d410a0f03f6a85.png)
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/3d916c7919354aeea0023eae22fbeeb6.png)
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/c9f16c7051e0464b93334e327ca18519.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/69fc11716971402c90036d148af4141d.png)
(2)求点
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/913e5e17d6d94847b9d410a0f03f6a85.png)
![](https://img.xkw.com/dksih/QBM/2017/2/6/1619486499913728/1619486500413440/STEM/7e67463512724d7cbd29218e5705b4ad.png)
您最近一年使用:0次
10 . 如图,矩形
中,
,
,
在
边上,且
,将
沿
折到
的位置,使得平面
平面
.
(Ⅰ)求证:
;
(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/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68696b781af2609327222d22cb7bab3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b348d4333ecdfc3e3b1ba16dc312550d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ced76e1ee551955a877688618b1f4ad.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5a101bb92bd721e35acc7023154b44.png)
![](https://img.xkw.com/dksih/QBM/2017/4/18/1668561570709504/1668648730017792/STEM/cd7d6f1167504c9eb741ff615f56b857.png?resizew=149)
您最近一年使用:0次
2017-04-18更新
|
2056次组卷
|
5卷引用:2017届广东省佛山市高三4月教学质量检测(二)数学理试卷