如图,已知正方体
的棱长为2.
![](https://img.xkw.com/dksih/QBM/2023/3/12/3193059511107584/3193203678601216/STEM/9dc57fcc32fc4d4c9c5cb641d880fddb.png?resizew=170)
(1)求直线
和平面ABCD所成角的大小;
(2)求直线
和平面ABCD所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2023/3/12/3193059511107584/3193203678601216/STEM/9dc57fcc32fc4d4c9c5cb641d880fddb.png?resizew=170)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
22-23高一·全国·课后作业 查看更多[5]
(已下线)8.6.2 空间角与空间距离(精练)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)8.6.2 直线与平面垂直(1) -2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(人教A版2019必修第二册)(已下线)专题10 空间角与空间距离的综合(1)-期中期末考点大串讲(已下线)专题10 空间角、距离的计算-期中期末考点大串讲(苏教版2019必修第二册)(已下线)10.3 直线与平面间的位置关系(第3课时)(七大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)
更新时间:2023-03-12 22:12:25
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【知识点】 求线面角
相似题推荐
解答题-证明题
|
较易
(0.85)
【推荐1】已知斜三棱柱
的底面是直角三角形,
,侧棱与底面所成角为
,点
在底面上射影
落在
上.
(Ⅰ)求证:
平面
;
(Ⅱ)若点
恰为
中点,且
,求
的大小;
(III)若
,且当
时,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80969d2b85b57d776a482dde2df0f5a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8e21dfb8c59897bb073cdc0b0dc7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a1ee2ea56b649946ca15c7a9ca0755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e1abac2c301863b08dba67bbee4b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909220d1db380634534190b662ee0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c72171ccd9796fbb7b493a2d927a39.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/161bc8727a789e42bf3f21f401d231b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69a9fd3fa24e54c9ac3a44a61dc92eb.png)
(Ⅱ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909220d1db380634534190b662ee0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c72171ccd9796fbb7b493a2d927a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50ec41d776c0955beba59a61babd548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a1ee2ea56b649946ca15c7a9ca0755.png)
(III)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9512aaea6156038faaffee9bcba4b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f03a0b1fd25b993a512cae45e52b300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785151ca88e30fe5f524af2659157a6d.png)
![](https://img.xkw.com/dksih/QBM/2012/2/11/1570729985384448/1570729990782976/STEM/f438f49d787242088954211c690c7852.png?resizew=199)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】如图,已知
是直角梯形,
,
垂直于平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ccd85579-d6d3-430a-98f7-a319906a9efe.png?resizew=131)
(1)求直线
与平面
所成角的正弦值;
(2)求平面
与平面
所成锐二面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7b5ea5627440c19999a9039eaa1c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d11dd7422f4703763abc23d83c7584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ccd85579-d6d3-430a-98f7-a319906a9efe.png?resizew=131)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
您最近一年使用:0次