我要步驟
求下例方程通解,答案以真碓值表示,否則須準確至最接近0.1度。
1 sin(2x+10)=4sin(2x-10)
2 sin2x+cos3x=sin4x
3 sin3x=cos2x
答案係
1 90n+8.2
2 120n正負30或180n+(-1)^n(30)
3 72n+18或360m+90
A-maths¬
2007-07-28 10:58 pm
回答 (1)
2007-07-28 11:02 pm
✔ 最佳答案
As follows:圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/liger.jpg?t=1185606142
2007-07-28 15:36:54 補充：
For question 3, there are many expressions for the general solution. So, there may be more than one answer.
參考: Myself~~~
收錄日期: 2021-04-23 20:33:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070728000051KK02521