化简(1+sin4x+cos4x)/(1+sin4x-cos4x)?
1个回答
展开全部
原式=(sin2x^2+cos2x^2+2sin2xcos2x+cos2x^2-sin2x^2)/(sin2x^2+cos2x^2+2sin2xcos2x-cos2x^2+sin2x^2)
=(2cos2x^2+2sin2xcos2x)/(2sin2x^2+2sin2xcos2x)
=[2(sin2x+cos2x)cos2x]/[2(sin2x+cos2x)sin2x]
=cos2x/sin2x=ctg2x,8,
=(2cos2x^2+2sin2xcos2x)/(2sin2x^2+2sin2xcos2x)
=[2(sin2x+cos2x)cos2x]/[2(sin2x+cos2x)sin2x]
=cos2x/sin2x=ctg2x,8,
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询