Please refer to the following question........
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Pure Maths --- Coordinate system
2008-07-17 11:47 pm
回答 (1)
2008-07-18 12:18 am
✔ 最佳答案
The question is to rotate the curve, not the axes, anti-clockwise, which is equivalent to rotating the axes clockwise. This is a relative motion.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080717000051KK01745