13-14高二下·山西·阶段练习
1 . 如图,在正方体
中,直线
与平面
所成的角的大小是
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572928027140096/1572928033079296/STEM/7dfce741-028b-480a-845f-fc1e11376f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572928027140096/1572928033079296/STEM/7dfce741-028b-480a-845f-fc1e11376f43.png)
A.90° | B.60° | C.45° | D.30° |
您最近一年使用:0次
2016-12-04更新
|
943次组卷
|
9卷引用:2015-2016学年河北省武邑中学高一下期中数学试卷
解题方法
2 . 已知在正方体
中,点
是棱
的中点,则直线
与平面
所成角的正弦值是______ .
![](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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
您最近一年使用:0次