若异面直线
和
的方向向量分别为
,
,则直线
与直线
所成角的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06a0912145b24bd9f377dc2722db367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9822763fd0dc9f780f1e609c6ee8233b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
更新时间:2023-10-27 16:28:39
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【知识点】 异面直线夹角的向量求法
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