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求证(1+sin2x)/(cosx+sinx)=cosx+sinx
人气：113 ℃　时间：2019-10-30 20:42:23
解答
(1+sin2x)/(cosx+sinx)
=(sin^2x+cos^2x+2sinxcosx)/(cosx+sinx)
=(cosx+sinx)^2/(cosx+sinx)
=cosx+sinx
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