(1+sin2x-cos2x)/(1+sin2x+cosx)

来源：学生作业学帮网编辑：学帮网时间：2024/05/28 03:47:24

(1+sin2x-cos2x)/(1+sin2x+cosx)
=(2sin²x+2sinxcosx)/(2cos²x+2sinxcosx)
=sinx(sinx+cosx)/[cosx(cosx+sinx)]
=tanx