sinx=cosx at x= pi/4
So then you take the integral from 0 to pi/4 of cosx-sinx dx and then from pi/4 to pi of sinx-cosx dx right?
收錄日期: 2021-04-24 00:54:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20180116224025AA8lp7s