求下列方程的通解
1) sinx - sin3x = cosx - cos3x
2) sinx + cosx = √2
3) 4sinx - 6cosx = 5
4) 8sinx + 6cosx = 3
收錄日期: 2021-04-24 09:45:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080130000051KK03672