May I know what is the exact solutions of...
cos(2x)-sinx = 1
Please show the steps you use.
Thank you~
(Sin Cos Problem) Find the exact solution~
2008-05-27 11:00 pm
回答 (1)
2008-05-27 11:16 pm
✔ 最佳答案
cos(2x)-sinx = 11-2(sinx)^2 - sinx -1=0
sinx (2sinx +1) =0
x= 0, pi, 7/6 pi, 11/6pi or 2pi
收錄日期: 2021-04-15 15:19:15
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080527000051KK01221