已知l是平面
内的一条直线,m是平面
的一条斜线,且m在平面
内的射影为
,若l与m的夹角为
,l与
的夹角为
,求m与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7093538ecfb10a639b23863e7331a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7093538ecfb10a639b23863e7331a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
21-22高二·全国·课后作业 查看更多[2]
更新时间:2022-03-01 11:03:45
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【知识点】 求线面角
相似题推荐
解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】如图,正方形
的边长为a,P为平面
外一点,
平面
,且
,求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3643fbbf4e0775dea240dff8fd6dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/8/22/3049866263945216/3050015054848000/STEM/52b13b5fcc6643989982fa0a8f7a492e.png?resizew=186)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】如图,圆的直径为
4,直线PA垂直圆所在的平面,C是圆上的任意一点.
(2)若
求PB与面PAC的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527504630b0caf2b399299dc06fd78e6.png)
您最近一年使用:0次