數學問題1條(關於MI)

2010-02-05 5:30 am

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數學問題1條(關於MI)!!
急!!
更新1:

c part 係=1/2[(cotπ/4n)-1]

回答 (1)

2010-02-05 6:13 am
✔ 最佳答案
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2010-02-04 22:13:41 補充:
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