1) Slove 2sin^2 x-2sinx-1=0 (0<x<2π)
2) Slove 2tanx +4=3開方2 secx (0<x<2π)
M2 questions
2011-09-25 3:13 am
回答 (1)
2011-09-26 8:45 am
收錄日期: 2021-04-23 20:44:53
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https://hk.answers.yahoo.com/question/index?qid=20110924000051KK00797