parametrically:
x = a(2cos(t) + cos(2t)), y = a(2sin(t) - sin(2t))
圖片參考:http://www-history.mcs.st-andrews.ac.uk/Curvepics/Tricuspoid/Tricuspoid1.gif
更新1:
Let the maximum x and minimum x be α and β.
Let the maximum x and minimum x be α and β.
收錄日期: 2021-04-22 00:33:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080304000051KK00005