from first principle, find the derivative
y= 1/(cosx+1) with respect to x. Thank you.
Form 4 Derivatives
2011-07-31 6:40 am
回答 (1)
2011-07-31 8:49 am
✔ 最佳答案
As follows:圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/ScreenHunter_01Jul310047.gif
收錄日期: 2021-04-22 00:55:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110730000051KK01318