名校
1 . 如图,在边长为2的正方体
中,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/09bdd5a7-d99f-44cd-aa3a-8a82db30d7b6.png?resizew=165)
(1)求证:
平面
;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/09bdd5a7-d99f-44cd-aa3a-8a82db30d7b6.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd597851c0db4e4de4769e10e09383b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
您最近一年使用:0次
解题方法
2 . 若、
分别是平面
、
的法向量,且
,
,
,则
的值为
您最近一年使用:0次
2023-12-22更新
|
145次组卷
|
3卷引用:广西北海市2021-2022学年高二上学期期末检测数学试题
广西北海市2021-2022学年高二上学期期末检测数学试题安徽省芜湖市华星学校2021-2022学年高二上学期期末考试数学试卷(已下线)3.4.3 求角的大小(九大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
3 . 给出下列命题:
①直线l的方向向量为
,直线m的方向向量为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dedfa42c16dd0aefa2928a6e41f3dba.png)
②直线l的方向向量为
,平面
的法向量为
,则
.
③平面
,
的法向量分别为
,
,则
.
④平面
经过三点
,
,
,向量
是平面
的法向量,则
.
其中真命题的个数是( )
①直线l的方向向量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc520546f7ed36f3dc300e86b5d8b8e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3857279c2f93b21c03c3c33c08053533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dedfa42c16dd0aefa2928a6e41f3dba.png)
②直线l的方向向量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df663f906a34b837d74c0940b18ed089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99212ca88f8ed54b0e9fcbfc9d552b3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e380108ba2cf04e68a5a9393d2b921c.png)
③平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e86eec1a07e9547b778094ac2f3dc6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777b4cabce2b79c1b0f3f740c455ab82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b303b1f07604f5303aea94df7f0518e9.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9976bb8d2b727e639df1dd47746cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f6f9d8550d619061ab0ba1105ec6a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1b5e2746ca7dc60b89e43fe65a8baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a23d387abd15fdd9e61d96196e08f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5192d71829a74681e6dea7efcd368f88.png)
其中真命题的个数是( )
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
4 . 已知
为直线l的方向向量,
,
是平面
,
的法向量(
,
是不同平面),那么下列说法正确的个数为( )
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c984376f5475184e0d3e4f7e1bb65f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37564ec4e9e92485f1769e8ffaac31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea23ab4f8fca98d34da5468750f6e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951dbf2c5def6e30783740388c45c45a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34e4c521014f0d3baf2d32a0adf0588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ddbc3e8ca5d6de7ae1469053571eb7.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
5 . 如图,在四棱锥
中,底面
是等腰梯形,
,
,
,
,
,
为
中点,
,
.
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](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/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb466d3d90e7d27f27c60c8beecd4444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9425630dcfe5a824c44904d4f71e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b235d0737ddc0d2c85abd4484c10d76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/0a50e735-7b25-4376-a0a8-0f4e2614a7d3.png?resizew=156)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e4c39ba72d14560e283ad7f75353a0.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
6 . 已知点
是平行四边形
所在的平面外一点,如果
,
,
,下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317a7d8f62c5daeb3f963f392d32bdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a9a87d18bca7451b1d26cfb42dfda1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e75f928f2166dd6e2bb52500f1383bf.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() | D.![]() |
您最近一年使用:0次
7 . 如图,在四棱锥
中,
平面ABCD,底面ABCD为正方形,
,E,F分别为PD,PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/0bd44357-ca0f-45c5-8a87-77a82472215e.png?resizew=143)
(1)求证:
平面PAD;
(2)求平面AEF与底面ABCD所成角的余弦值.
![](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/c3b10835116b9b777a666b438c907b49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/0bd44357-ca0f-45c5-8a87-77a82472215e.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(2)求平面AEF与底面ABCD所成角的余弦值.
您最近一年使用:0次
名校
解题方法
8 . 在三棱锥
中,
平面
,
,且
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/d3855e9d-4d1b-43b7-a594-a432b8f75481.png?resizew=154)
(1)求异面直线
与
所成角的正弦值;
(2)求二面角
的余弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36ec028056ca8b0b9ab2f43e3aeaf36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd654221ab95fe241d9e0202443f2609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea757c19148fbebb6fb9fc86f34621c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0102927549599b1b60bdefcd38464a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/d3855e9d-4d1b-43b7-a594-a432b8f75481.png?resizew=154)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5617a404c5a3356753136e5a6b6d51e5.png)
您最近一年使用:0次
2023-12-13更新
|
455次组卷
|
2卷引用:黑龙江省哈尔滨市宾县第二中学2021-2022学年高二上学期期末数学试题
9 . 已知正方体中,
是
的中点,则直线
与平面
所成角的余弦值是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-12-13更新
|
296次组卷
|
4卷引用:甘肃省徽县第一中学2021-2022学年高二上学期期末数学(理)试题
甘肃省徽县第一中学2021-2022学年高二上学期期末数学(理)试题(已下线)专题13 空间向量的应用10种常见考法归类(2)6.3 空间向量的应用 (5)福建省福州市第十一中学2023-2024学年高二上学期期末考试数学试卷
10 . 若直线
的一个方向向量
,平面
的一个法向量为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1dafa2d0d2c21051877e056e03b6d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d132e91323cf76c9f111061ebaa950f9.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次