1 . 如图,在棱长为2的正方体
中,点
是棱
上的动点.
;
(2)若点
是棱
的中点,求二面角
的大小.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b30478b45ea023eb5d23805aadf709.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee31a4af85968dc63bd86a779a77d34.png)
您最近一年使用:0次
2024-02-12更新
|
190次组卷
|
2卷引用:专题05 空间直线与平面-《期末真题分类汇编》(上海专用)
解题方法
2 . 如图,在正方体
中.
(1)求异面直线AC与
所成角的大小;
(2)求证:
;
(3)求二面角
平面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/f7cc5cc1-0f28-42fb-b836-d741671c1fc6.png?resizew=152)
(1)求异面直线AC与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec99f21b5368bf8776e62003c12dd705.png)
您最近一年使用:0次
2023-08-09更新
|
442次组卷
|
2卷引用:天津市滨海新区塘沽第十三中学2022-2023学年高一下学期期中数学试题