名校
1 . 如图,在四棱锥
中,
底面
,
,
,
,
,点E为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849588043554816/2849876778483712/STEM/d9233d3e-19db-4bf4-9fed-a801ce8f8b23.png?resizew=248)
(1)证明:
平面
;
(2)若F为棱
上一点,
且满足
,求二面角
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba814113887c21637c1954f244812f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849588043554816/2849876778483712/STEM/d9233d3e-19db-4bf4-9fed-a801ce8f8b23.png?resizew=248)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若F为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352b1b1ee6f9e39e83c8b881aff0cb79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ffab0355be3dd7e37ed8b1be35e297.png)
您最近一年使用:0次
解题方法
2 . 如图,平行六面体
的底面为菱形,且
,
,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/11/6/2845466838155264/2847719718338560/STEM/3679315bf3ad4b77a15687ca125df239.png?resizew=295)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a6ee51af9b52152488b1772fa190fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f688da37e8c00fb06e0bf5d0c59974.png)
![](https://img.xkw.com/dksih/QBM/2021/11/6/2845466838155264/2847719718338560/STEM/3679315bf3ad4b77a15687ca125df239.png?resizew=295)
A.![]() | B.![]() |
C.平面![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
名校
3 . 如图,在平行六面体
中,以顶点
为端点的三条棱长都是
,且它们彼此的夹角都是
,
为
与
的交点,若
,
,
,
![](https://img.xkw.com/dksih/QBM/2021/10/8/2824926988795904/2827880314355712/STEM/cf9e3e1d02ba4e71b9a2846df0bde898.png?resizew=211)
(1)用
,
,
表示
和
;
(2)求直线
与
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b536ac375a0b74e9c7efbc585f987f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4abd10ab43ce90743bd0f79b1f5bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc6f461f4715a6c25e8df41ab35a565.png)
![](https://img.xkw.com/dksih/QBM/2021/10/8/2824926988795904/2827880314355712/STEM/cf9e3e1d02ba4e71b9a2846df0bde898.png?resizew=211)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524594bf0942ed86f56fc1eee120a81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb3a156336d41abd8a7256c592cc83a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87470f6137cb2d3755bb229ab0dda909.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
您最近一年使用:0次
2021-10-12更新
|
293次组卷
|
9卷引用:广东省广州市第八十九中学2021-2022学年高二上学期第一次月考数学试题
广东省广州市第八十九中学2021-2022学年高二上学期第一次月考数学试题山东省烟台市莱州市第一中学2021-2022学年高二上学期10月月考数学试题辽宁省大连市第三十六中学2021-2022学年高二上学期10月月考数学试题(已下线)专题1.3 空间向量与立体几何 章末检测3(难)-【满分计划】2021-2022学年高二数学阶段性复习测试卷(人教A版2019选择性必修第一册)辽宁省大连市第二十三中学2020-2021学年高二上学期10月月考数学试题2023版 北师大版(2019) 选修第一册 突围者 第三章 全章综合检测(已下线)6.1.2空间向量的数量积(2)(已下线)1.2 空间向量基本定理 精讲(5大题型)-【题型分类归纳】2023-2024学年高二数学同步讲与练(人教A版2019选择性必修第一册)云南省曲靖一中麒麟学校2021-2022学年高二上学期期末过关卷二(A卷)数学试题
解题方法
4 . 若
,
是抛物线
上的两个动点,满足
,则线段
的中点
到抛物线
的准线
的距离的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ed9d97b8745ed1c15349ea3fffc299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.2 | B.4 | C.6 | D.8 |
您最近一年使用:0次
名校
5 . 如图,在三棱柱
中,
平面
,
为
的中点,
交
于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/f4a9c62c-d47a-4223-a643-a7026890e071.png?resizew=139)
(1)证明:
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac4fb99967c46a3855bcf2885b448c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d612654002c91f5f163657c2d08b4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6647279ce35b9d59d06ad495219a28a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcca943ee165b1a3ff7e0cc5f463754b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488c9cb4d88938d832617f520a3ca951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f73038249a611568193c0bcc286fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8db88bd0a6b2df8a6d1d17eccd2d101.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/f4a9c62c-d47a-4223-a643-a7026890e071.png?resizew=139)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5e9bf7536a8512ef10452ab5dda5be.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb47a55fe8ddb920cec48b829de79ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57676c7d697928a0021a827d5f0daedf.png)
您最近一年使用:0次
2020-07-13更新
|
454次组卷
|
7卷引用:广东省珠海市第二中学2022届高三上学期10月月考数学试题
2021高三·全国·专题练习
6 . 如图,直三棱柱
中,AB=BC=CA=2,
若N为AB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/71699b9e-e370-438a-acc3-5a16d5bc6df6.png?resizew=171)
(1)求证:
平面
;
(2)求
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/9b04ec038180fa66533f0ccaa83b5ecc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/71699b9e-e370-438a-acc3-5a16d5bc6df6.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9593b5bde2cef14d5ca46973420f62b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9593b5bde2cef14d5ca46973420f62b.png)
您最近一年使用:0次
2021-01-27更新
|
307次组卷
|
3卷引用:广东省广州市天河区2020-2021学年高二上学期期末数学试题
广东省广州市天河区2020-2021学年高二上学期期末数学试题(已下线)大题专项训练15:立体几何(线线角、线面角)-2021届高三数学二轮复习重点题型训练13:第6章平行关系、垂直关系-2020-2021学年北师大版(2019)高中数学必修第二册
7 . 如图,在四棱锥
中,底面
为平行四边形,E为
的中点,
平面
为等边三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/9ef7d43b-6ba5-4f94-923c-eb212642eec6.png?resizew=277)
(1)若
平面
,求
的值;
(2)在(1)的条件下,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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed35808d0a9c4eb0fad0cee828a140f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b1e6cb3f31814e2515b68f43d93f4a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/9ef7d43b-6ba5-4f94-923c-eb212642eec6.png?resizew=277)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546990b47ca3fdd5681de4749246d38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)在(1)的条件下,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3541d43bfeba7f5a5cf0112b93932020.png)
您最近一年使用:0次
解题方法
8 . 在长方体
中,
,
,且
与底面
所成角为60°,则直线
与平面
所成的角的正弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d30e49e97f35ea7b40ec44a7e69c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86eec8526479272d15bb3b171a46de0.png)
您最近一年使用:0次
2020-12-01更新
|
462次组卷
|
3卷引用:广东省揭阳市揭东县2020-2021学年高二上学期期末数学试题
名校
9 . 如图所示,
是等边三角形,
,
,二面角
为直二面角,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/380e3a43-8c39-4b5d-882a-ccff3ee9a44b.png?resizew=148)
(1)求证:
;
(2)求平面
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1912c4e0fe478ba402a887fdc759d3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a8d8fe0503af1c8f8d04eaf211bac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53407e6605074b8071d2ce57900a71f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/380e3a43-8c39-4b5d-882a-ccff3ee9a44b.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
解题方法
10 . 如图,四棱柱
的底面
是正方形,
为底面中心,
平面
,
.则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/11/16/2852648714633216/2854626751602688/STEM/e9e18dfb-febc-4ab7-bcdc-ef9743caeaa0.png?resizew=364)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a74b4952ac58a5e3fa3f2de86024ef6.png)
![](https://img.xkw.com/dksih/QBM/2021/11/16/2852648714633216/2854626751602688/STEM/e9e18dfb-febc-4ab7-bcdc-ef9743caeaa0.png?resizew=364)
A.![]() ![]() | B.平面![]() ![]() |
C.![]() ![]() | D.点![]() ![]() ![]() |
您最近一年使用:0次
2021-11-19更新
|
295次组卷
|
3卷引用:广东省高州市校际2021-2022学年高二上学期11月联考数学试题