在直角坐标系
中,设A(-2,3),B(3,-2),沿
轴把直角坐标平面折成大小为
的二面角后,这时
则
的大小为_____
![](https://img.xkw.com/dksih/QBM/2010/4/12/1569696237862912/1569696242737152/STEM/f55b2c0f5c304b80b286b8233ca6f32b.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2010/4/12/1569696237862912/1569696242737152/STEM/5a63a970d866492882c11672eafb70fb.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2010/4/12/1569696237862912/1569696242737152/STEM/8607f1df26304d6dbb0b13d085ac500c.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2010/4/12/1569696237862912/1569696242737152/STEM/a30a481925264639ae5f23511378ad0c.png?resizew=81)
![](https://img.xkw.com/dksih/QBM/2010/4/12/1569696237862912/1569696242737152/STEM/8607f1df26304d6dbb0b13d085ac500c.png?resizew=13)
13-14高二上·安徽池州·期中 查看更多[1]
(已下线)2013-2014学年安徽池州第一中学高二上学期期中考试理科数学试卷
更新时间:2016-12-02 15:20:33
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