solve the following equations for 0 <= x <= 360 ,
sin 3x + cos 3x = sin 2x + cos 2x
the ans is 0, 18, 90, 162, 234, 306 or 360
how to do?! ...thz
收錄日期: 2021-04-18 21:04:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070308000051KK02636