請問
積分 sinx/cos^3x dx
怎麼得到下面答案的呢
=1/2cos^2x
積分 sinx/cos^3x dx =1/2cos^2x
2011-01-28 1:40 am
回答 (2)
2011-01-28 7:31 am
✔ 最佳答案
As follows:圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/ScreenHunter_03Jan272330.gif
2011-01-28 6:27 am
積分sinx/cos^3x dx =積分1/cos^3x(sinx dx )=積分-1/cos^3x(dcosx )
=1/2cos^2 x+C
=1/2cos^2 x+C
收錄日期: 2021-04-22 00:53:24
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110127000015KK05833