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23-24高二上·全国·课后作业 查看更多[3]
人教B版(2019) 选修第一册 北京名校同步练习册 第一章 空间向量与立体几何 1.2空间向量在立体几何中的应用 1.2.4二面角(一)(已下线)第09讲 拓展三:二面角的传统法与向量法(含探索性问题,7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)(已下线)第17讲 第八章 立体几何初步 章末重点题型大总结-【帮课堂】(人教A版2019必修第二册)
更新时间:2023-06-05 18:19:56
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【知识点】 求二面角
相似题推荐
填空题-单空题
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适中
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解题方法
【推荐1】正四面体
棱长为2,
平面
,垂足为O,设M为线段
上一点,且
则二面角
的余弦值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c7294c325b4eb1155c4e033a1055a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd187d02ca8d7050774ef9683094e44.png)
![](https://img.xkw.com/dksih/QBM/2020/12/19/2617719192281088/2617797559566336/STEM/983b3aadb1644b7cae56cc5207e6babb.png?resizew=256)
您最近一年使用:0次
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【推荐2】如图,
为正方体,下面结论中正确的是______ .(把你认为正确的结论都填上)
①
平面
;
②
平面
;
③
与底面
所成角的正切值是
;
④二面角
的正切值是
;
⑤过点
与异面直线
与
成
角的直线有2条.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/a5659a3f-deea-436f-a55e-d874341714c1.png?resizew=172)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3c0430146b7b8d40ebb721a4d0de19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86eec8526479272d15bb3b171a46de0.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86eec8526479272d15bb3b171a46de0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
④二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52bd8b014ebd8b1cc34b66912b0b9ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
⑤过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aa0b9869db50a9ab48cc32925d8e96.png)
您最近一年使用:0次
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【推荐3】如图,多面体
,
,
,
,且
,
,
两两垂直,给出下列5个结论:
①三棱锥
的体积是定值;
②球面经过点
、
、
、
四点的球的直径是
;
③直线
平面
;
④直线
与
所成角是
;
⑤二面角
等于
.
其中正确的结论是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa916746dcab1ab5c71af86d6f60e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292d0b9ce587bd5df884a988c22ccba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffad3ec335247a91d4daa1a44be7978e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55a7128fd93495c0c355ba55d9584bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
②球面经过点
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38e752c16ae27d35378a765172022b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
⑤二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af8a8aab57d23bbae8ef11086a5b416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
其中正确的结论是
![](https://img.xkw.com/dksih/QBM/2021/4/17/2701598904377344/2703366251462656/STEM/9ff1eac6-9af0-4cac-8ee5-0406a2445b25.png?resizew=188)
您最近一年使用:0次