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2Â¥: Originally posted by feixiaolin at 2013-12-05 22:14:23
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1½×£º(-sinx+cosx)/(cosx+sinx)=1-2sinx/(cosx+sinx)
2½×£º-[2cosx*(cosx+sinx)-2sinx*(-sinx+cosx)]/(cosx+sinx)^2=-2/(1+sin(2x))
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ÒýÓûØÌû:
2Â¥: Originally posted by feixiaolin at 2013-12-05 22:14:23
1½×£º(-sinx+cosx)/(cosx+sinx)=1-2sinx/(cosx+sinx)
2½×£º-/(cosx+sinx)^2=-2/(1+sin(2x))
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4Â¥: Originally posted by lypku at 2013-12-05 22:35:59
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