1. 4sin^2 X +3cot^2 X=4 0<2pi
2. 2cot^2 X +2csc^2 X - 7csc X +5= 0 0<2pi
Amath~急~
2007-12-08 6:56 pm
回答 (1)
2007-12-08 9:20 pm
✔ 最佳答案
As follows: 圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths018.jpg?t=1197091183
參考: My Maths Knowledge
收錄日期: 2021-04-14 01:07:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071208000051KK00861