a,b为空间两条互相垂直的直线,直角三角形
的直角边
所在直线与a,b都垂直,斜边
以
为旋转轴旋转,
,有下列结论:
①当直线
与a成60°角时,
与b成30°角;
②当直线
与a成60°角时,
与b成45°角;
⑤直线
与a所成角的最大值为60°;
④直线
与a所成角的最小值为30°;
其中正确的是___________ .(填写所有正确结论的编号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
①当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
⑤直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
其中正确的是
19-20高二下·上海浦东新·期中 查看更多[3]
(已下线)上海市华东师范大学第二附属中学2019-2020学年高二下学期期中数学试题(已下线)高二期末押题02-2020-2021学年高二数学下学期期末专项复习(沪教版)(已下线)3.1空间向量及其运算(作业)(夯实基础+能力提升)-【教材配套课件+作业】2022-2023学年高二数学精品教学课件(沪教版2020选择性必修第一册)
更新时间:2020-09-13 19:33:11
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②
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③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f0c661b0675ef41911722f087941bc.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3397f57799ac963b5846c5db9e4e7216.png)
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