如图,在三棱锥S-ABC中,
平面ABC,
,
,
,
,则直线SC与平面SAB所成角的正弦值为( )
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595204682768384/2601979299127296/STEM/34c4c03a-494a-423e-9868-359244bd6070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1804c3641953c30ccf750504eff6577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595204682768384/2601979299127296/STEM/34c4c03a-494a-423e-9868-359244bd6070.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-11-27 14:43:20
|
相似题推荐
单选题
|
较易
(0.85)
【推荐1】如图,在长方体
中,
,
,则四棱锥
的体积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c6b0a6cb307c4c02f503831862f7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65aca81ef30f0e3e00a4c2b3c53d4846.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/742cbdfd-ac98-4a54-b9ed-368ece95b146.png?resizew=173)
A.6 | B.9 | C.18 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
解题方法
【推荐2】在正方体
中,过点B的平面
与直线
垂直,则
截该正方体所得截面的形状为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.三角形 | B.四边形 | C.五边形 | D.六边形 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
解题方法
【推荐1】如图,已知正三棱柱
侧棱长是底面边长的两倍,
,
分别为
和
的中点,则下列陈述不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/1c27c601-c0c2-4ddf-bd6f-a8c50c766c21.png?resizew=130)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9214f0f88abad3f5b0fbf82453052b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/1c27c601-c0c2-4ddf-bd6f-a8c50c766c21.png?resizew=130)
A.![]() ![]() |
B.![]() |
C.![]() ![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】已知棱长都为3的正三棱柱
中,
分别为棱
上的点,当
取得最小值时,
与平面
所成角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebf67d880172b27fefacc3c5b808eae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d0ed3801e3615a2de34b363bd9b47f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次