(1+sin2x-cos2x)/1+sin2x+cos2x
(sin^2x+COS^2x+2sinxcosx+sin^2x-cos^2x)/(sin^2x+COS^2x+2sinxcosx+cos^2x-sin^2x)
我已经化到这一步了接下来怎么办
人气：359 ℃ 时间：2020-06-03 17:16:59
解答
1+2sinxcosx-（1-2（sinx）^2)/1+2sinxcosx+(2(cosx)^2-1)
=2sinxcosx+2(sinx)^2/2sinxcosx+2(cosx)^2
=tans
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