Agree with your answer

来源: AnaZhang 于 2010-05-26 18:36:36 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (148 bytes)
回答: 要用微积分的吧。 由 Commentate 于 2010-05-26 13:14:25

The path that the point on the circle takes is called a cycloid. The equations that you used are the formula for the length of one arc of a cycloid.

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• Thanks, I did not know that word before -guest007- ♀ 给 guest007 发送悄悄话 (54 bytes) () 06/02/2010 postreply 09:14:07

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