已知菱形
,
,将
沿对角线
折起,使以
四点为顶点的三棱锥体积最大,则异面直线
与
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf80b036459da6dcb841a4bbe3859fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f63756fe9251e65cc14e1ce9723d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2024·湖北武汉·模拟预测 查看更多[3]
更新时间:2024-06-10 18:39:41
|
【知识点】 异面直线夹角的向量求法
相似题推荐
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】如图四边形ABCD,
,
.现将
沿BD折起,当平面ABD与平面BDC垂直时,直线AB与CD所成角的余弦值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/dcf05d82-aafa-4eff-9f6f-a4d27da94da7.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cda253ab77e4f92ecbbcb7da292e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503c035fc57fb25aede1445af9aa2747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/dcf05d82-aafa-4eff-9f6f-a4d27da94da7.png?resizew=172)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】若正四棱柱
的体积为
,
,则直线
与
所成的角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://img.xkw.com/dksih/QBM/2020/3/15/2420294000615424/2420694766141440/STEM/f1b8e7a633f5479bb398e6d81af789d5.png?resizew=28)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐3】已知正三棱柱
的侧棱长为3,底面边长为2,则直线
与侧面
所成角的正弦值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次