在三棱柱
中,各棱长相等,侧棱垂直于底面,点
是侧面
的中心,则
与平面
所成角的大小是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
13-14高二上·四川凉山·阶段练习 查看更多[1]
(已下线)2012-2013学年四川省昭觉中学高二10月月考理科数学试卷
更新时间:2017-03-06 09:48:39
|
【知识点】 求线面角
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适中
(0.65)
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解题方法
【推荐1】如图,在三棱柱
中,侧棱垂直于底面,底面是边长为2的正三角形,侧棱长为3,则
与平面
所成的角为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/876f7f16-297e-4ff6-a174-2367f7f4ddae.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/876f7f16-297e-4ff6-a174-2367f7f4ddae.png?resizew=162)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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适中
(0.65)
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解题方法
【推荐2】如图,在正四棱柱
中,
,
,
是侧面
内的动点,且
,记
与平面
所成的角为
,则
的最大值为( )
![](https://img.xkw.com/dksih/QBM/2021/7/29/2774718342291456/2823586911690752/STEM/64fc1e89ce6a4db09b8006af112df7a6.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbcdb9f641a2b3e06e0a01c79420667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
![](https://img.xkw.com/dksih/QBM/2021/7/29/2774718342291456/2823586911690752/STEM/64fc1e89ce6a4db09b8006af112df7a6.png?resizew=178)
A.![]() | B.![]() | C.2 | D.![]() |
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