化簡下列各式
(cos³θ-cos3θ)/cosθ + (sin³θ+sin3θ)/sinθ
a-maths!!!!!
2007-12-11 2:49 am
回答 (1)
2007-12-11 3:05 am
✔ 最佳答案
As follows:圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths025.jpg?t=1197284700
參考: My Maths Knowledge
收錄日期: 2021-04-23 20:37:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071210000051KK02777