如图,二面角
的大小是45°,线段
.
,
与
所成的角为30°.则
与平面
所成的角的正弦值是▲
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754bbd99327195520a4ca3ce3b9a0577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9934483d3f6ceb7fd9f6ea8a2747940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36671a5652834ef8b3984fa76643ce5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
10-11高二下·四川成都·阶段练习 查看更多[1]
(已下线)2010-2011年四川省成都市树德协进中学高二3月月考数学试卷
更新时间:2016-11-30 17:26:38
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【知识点】 求线面角
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【推荐2】如图,在正方体
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