1 . 在三棱柱
中,平面
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/929825ec-dd81-4486-98b1-2103bd357105.png?resizew=174)
(1)证明:
;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2623e1c4ecbd65ae5e0285c0453ffd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e793c52fdd16cc602eaf753964ec02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd9abf9ec52d85bfe36188e95e6ad6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29e8a1eefb6776168969a1155c9e9c5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/929825ec-dd81-4486-98b1-2103bd357105.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba985fb50a9078a839b66bf1d1eadea9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403ec256d712cf32d21ed51d71648c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e975f6c9fafab8fd7639dc0cd0f70a4.png)
您最近一年使用:0次
名校
2 . 如图,在三棱锥
中,
,
,
,
,
,
分别为线段
,
上的点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7c18f9db65fcd840b39d7bbd3028c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28597da489dc639750523c83fbc11c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e99aae9fa3f0cd6405461b8db163e8.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aabee6b0c633ffd42f01af2e1fb8a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75dc7cef548ba1fda2b082733baae52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb0f9de2f087af7ef18ee9184d88b51.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69fbd5a9df4c0210604cf1ae2fa7e0c.png)
您最近一年使用:0次
2019-01-23更新
|
508次组卷
|
5卷引用:【市级联考】甘肃省张掖市2019届高三上学期第一次联考数学(理)试题
名校
3 . 如图,在三棱锥
中,
,
为
的中点,
平面
,垂足
是线段
上的靠近
点的三等分点.已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b112c310a6aa811a735fed9d08cdf9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/0d53ba37-c93f-457c-acad-d285e42bede1.png?resizew=159)
(1)证明:
;
(2)若点
是线段
上一点,且平面
平面
.试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a49d7f01692ba3b1bd08dcabc7faee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b112c310a6aa811a735fed9d08cdf9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/0d53ba37-c93f-457c-acad-d285e42bede1.png?resizew=159)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbad7ad1465d1c4c177e3321e6ed12a.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec89c4d9a43c9d4f7e0ddcfe0a9360b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c5ef850e256c98ca4f033999e61311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f32f82942e12701f6ba4b87d02291b1.png)
您最近一年使用:0次
名校
4 . 如图,在梯形
中,
,
,
,现将
沿
翻折成直二面角
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/381bc715-77fe-4609-938a-ada15fa13cc5.png?resizew=468)
(Ⅰ)证明:
;
(Ⅱ)若异面直线
与
所成角的余弦值为
,求二面角
余弦值的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de3595bb7c79503fabd75d99196ccb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbced129627233661d88e9663a9e13c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/381bc715-77fe-4609-938a-ada15fa13cc5.png?resizew=468)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec82279b14a119057fdd78b85d63e669.png)
(Ⅱ)若异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
您最近一年使用:0次
2019-01-22更新
|
3815次组卷
|
4卷引用:【市级联考】福建省宁德市 2019届高三第一学期期末质量检测数学理科试题
5 . 如图,在长方体
中,
,
,点E是线段AB的中点.
求证:
;
求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95db5d71f0d7cdb83e2b6bb25cea42b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7fa3aea72ccc36948a4a90f7368f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62191bcb4f06ed7667c470207a91cf8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0f3ad5d895dcaad4920847c7d9bc00.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/d5dd7750-88bb-4975-bd9b-d855ed0e6416.png?resizew=195)
您最近一年使用:0次
2019-01-21更新
|
410次组卷
|
2卷引用:【校级联考】吉林省“五地六校”合作2018-2019学年高二 第一学期期末考试 文科数学试题
6 . 如图所示,
是正三角形,线段
和
都垂直于平面
,设
,
,且
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/4e302267-a7f7-4554-aa51-99c91cf14570.png?resizew=96)
(1)求证:
平面
;
(2)求证:
;
(3)求平面
与平面
所成的较小二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3b1722b100297f2fa8fad62423149d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede69346d90f2c2c7d738d90c6aa60a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/4e302267-a7f7-4554-aa51-99c91cf14570.png?resizew=96)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39b13d187b25461d85a3b8d10c7b678.png)
(3)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
名校
7 . 如图,已知矩形ABCD所在平面外一点P,
平面ABCD,E、F分别是AB、PC的中点.
求证:(1)
共面;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edaf1e8554f3be29c6d9b94c2413d04.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b833db5aa6e38de0cdd55bcab1c74c27.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/33bb53cd-a13b-4ecb-8d5e-0ef6880cec47.png?resizew=152)
您最近一年使用:0次
2019-01-16更新
|
2625次组卷
|
12卷引用:江苏省泰州市田家炳中学2017-2018学年度第二学期高二第二次学情调研考试数学(理)
江苏省泰州市田家炳中学2017-2018学年度第二学期高二第二次学情调研考试数学(理)(已下线)专题8.6 空间向量及其运算和空间位置关系(精练)-2021年新高考数学一轮复习学与练(已下线)专题1.3 空间向量的应用(A卷基础篇)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教A版,浙江专用)山西省太原市第五十六中学2021-2022学年高二上学期10月月考数学试题(已下线)第1.5讲 用空间向量研究直线和平面的位置关系-2021-2022学年高二数学链接教材精准变式练(人教A版2019选择性必修第一册)内蒙古乌兰察布市2021-2022学年高二上学期期末考试数学(理)试题江苏省宿迁市泗阳县实验高级中学2021-2022学年高二下学期第一次月考数学试题(已下线)第05讲 空间向量及其应用 (高频考点—精讲)-2第三章空间向量与立体几何单元检测B卷(综合篇)-2021-2022学年高二上学期北师大版(2019)数学选择性必修第一册(已下线)模块三 专题4 空间点、直线平面与空间向量 A基础卷(人教B)(已下线)第一章 空间向量与立体几何(基础、典型、新文化、压轴)分类专项训练-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)新疆维吾尔自治区喀什地区巴楚县第一中学2023-2024学年高二上学期期末数学试题
名校
8 . 如图所示,在棱长为2的正方体
中,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/9d08040e-42a4-4e3a-9446-a703bdaec31b.png?resizew=167)
(1)求证:
;
(2)求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688ded2b11bec14b5fdec97add4848a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/9d08040e-42a4-4e3a-9446-a703bdaec31b.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/687b84d99861c0efa5c20af61fba78a8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbea35579e39f3430d7a0ab3b2a984af.png)
您最近一年使用:0次
9 . 如图,四棱锥P﹣ABCD的底面为矩形,侧棱PA⊥底面ABCD,且PA=AD,E,F分别是线段PA,PD的中点,H在线段AB上.
(1)求证:PC⊥AF;
(2)若平面PBC∥平面EFH,求证H是AB的中点;
(3)若AD=4,AB=2,求点D到平面PAC的距离.
(1)求证:PC⊥AF;
(2)若平面PBC∥平面EFH,求证H是AB的中点;
(3)若AD=4,AB=2,求点D到平面PAC的距离.
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095992765210624/2097427692273664/STEM/04bfa9520c1a4a19ada3cee5d8f2745b.png?resizew=152)
您最近一年使用:0次
2018高一上·全国·专题练习
10 . 在正方体
中,点
分别在
上,
,
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a460f95e8ebabac97d572fecea8fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f12910c2ceaeb7721dd0cab598157b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4856428ba675ee6a1a4b679e201075d5.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7889947f82495b0721461b49b045bc4d.png)
您最近一年使用:0次