如图,在正四棱台
中,
,则
与平面
所成角的大小为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/28e7fc99-a5eb-4a92-b6f6-df6b1c31a588.png?resizew=206)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8bf606dd844e02fc6f28a8b6aab10a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/28e7fc99-a5eb-4a92-b6f6-df6b1c31a588.png?resizew=206)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-07-11 09:33:48
|
【知识点】 求线面角
相似题推荐
单选题
|
适中
(0.65)
解题方法
【推荐1】直四棱柱
中,底面四边形
为菱形,
,
,
,
为
中点,过
且和平面
垂直的平面为平面
,
平面
,则直线
和平面
所成角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7bce5b3862e12e5c7d206c35052471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654c748167a54aaf2fe2539dbcd6f046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】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/2022/12/7/7d0d24ee-6145-46b8-bc8f-dcf66856a1fa.png?resizew=116)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/7d0d24ee-6145-46b8-bc8f-dcf66856a1fa.png?resizew=116)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次