如图,三棱锥
中,
,
,
,
分别是
的中点,
是
的中点,则异面直线
与
所成角的余弦值等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/079488bc-cdce-401f-8691-b0904168d1c3.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8781ee77d7a6ed647fcfebb1066b97ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42789f54f6d3e1d508837711c6a873b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbab39da847da8a559994b6c6004aa60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18de8d74f723ffb1ba7bd48c05a70855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa058eda3e698b8eef1a6a636525767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/079488bc-cdce-401f-8691-b0904168d1c3.png?resizew=168)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-07-19 23:23:38
|
相似题推荐
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知长方体
,下列向量的数量积一定不为0的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/de4bdd9a-4b70-4709-bfc8-7f10ba943825.png?resizew=206)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】如图,
的二面角的棱上有
两点,直线
分别在这个二面角的两个半平面内,且都垂直于
,已知
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/ce575a2a-c6df-4c9b-ac81-f2309a4665c1.png?resizew=204)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beaa6572e4e3c41ea3cf9aee28992949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/ce575a2a-c6df-4c9b-ac81-f2309a4665c1.png?resizew=204)
A.![]() | B.7 |
C.![]() | D.9 |
您最近一年使用:0次
单选题
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【推荐1】在直三棱柱
中,
,
,
,则异面直线
与
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe236a434aa88e5633ea61574d1bed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】如图,在平行六面体
中,
,则直线
与直线AC所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a2d3f8941eeaa03b957d1ba6a2f867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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