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读到一篇国立台湾师范大学数学系郭君逸副教授写的有趣文章:

sites.google.com/a/g2.nctu.edu

塑料吸管的斜口不是圆锥截面,侧看过去其实是正弦曲线,因为吸管用剪刀或裁刀裁切的时候,会先被压扁再被剪切。具体为什么侧面看过去是正弦曲线文章里有详细说明。

真是世事洞明皆学问,处处留心有数学啊。 twitter.com/txyyss/status/1300

t.me/private_channel_c14370a/4

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