[其他] 繞原點旋轉
請問下面這個要怎樣證明 謝謝http://i.imgur.com/77yicPg.jpg
![](https://i.imgur.com/77yicPg.jpg)
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推
12/06 12:26, , 1F
12/06 12:26, 1F
→
12/06 12:37, , 2F
12/06 12:37, 2F
→
12/06 14:19, , 3F
12/06 14:19, 3F
→
12/06 14:19, , 4F
12/06 14:19, 4F
推
12/06 14:21, , 5F
12/06 14:21, 5F
推
12/07 18:23, , 6F
12/07 18:23, 6F
→
12/07 18:25, , 7F
12/07 18:25, 7F
→
12/07 18:25, , 8F
12/07 18:25, 8F