我做HW既時候...
有條問題搞嚟搞去都揾唔到Ans....
條問題係:
微積分(個Symbol唔識打)SinxCos^2x dx
之後睇Solution見到:
SinxCos^2x dx
=cox^2x d(cosx)
唔知點解個DX變咗做D(cosx)......
求解.......
A.Maths問題一問~~~微積分的
2007-10-11 3:41 am
回答 (2)
2007-10-11 4:03 am
✔ 最佳答案
As follows~~~圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/i.jpg?t=1192017773
2007-10-10 20:03:18 補充：
variables~~~ 唔係vairables
參考: Myself~~~
2007-10-11 3:49 am
因為 d(cos)/dx = -sinx
利用differntial的概念, 得出d(cos x) = - sinx dx
利用differntial的概念, 得出d(cos x) = - sinx dx
收錄日期: 2021-04-13 13:51:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071010000051KK03092