中大數學系大學甄選入學試題[101](2)

2015-04-07 5:26 am

回答 (2)

2015-04-07 5:56 am
✔ 最佳答案
Please read:


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2015-04-08 18:54:15 補充:
(tanx)^(sinx) = (1/tanx)^(cosx)
(tanx)^(sinx) = 1/(tanx)^(cosx)
(tanx)^(sinx)(tanx)^(cosx) = 1
(tanx)^(sinx + cosx) = 1

可以簡單一點。
2015-04-07 7:56 am
(tanx)^(sinx+cosx) =1
tanx=1 or sinx+cosx=0 (tanx = -1)
x= n *pi+ pi/4

2015-04-07 00:07:10 補充:
sorry, x= n*pi +/- pi/4


收錄日期: 2021-04-30 19:35:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150406000010KK05769

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