Pls find the general solutions
1)sin3x+cos2x=0
2)cosxcos3x=cos7xcos5x
3)sin6xsinx=cos3xcos4x
4)16cos^4 x=1
5)tanx=cotx
6sin(x+40degrees)sin(x-40degrees)=3/5
7)sin7x-sinx=sin3x
8)cos3x=cos2xcosx
sin9x+sin5x+sin^2 x=1
F4 Maths Question Pls Help~!
2008-09-09 2:08 am
回答 (1)
2008-09-13 7:09 am
收錄日期: 2021-04-25 23:23:36
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https://hk.answers.yahoo.com/question/index?qid=20080908000051KK01477