求不定积分 ∫sin2x/(1+sin^2x)dx 求解!!
3个回答
展开全部
sin(2x)/(1+sin²x)
=sin(2x)/[1+(1-cos(2x))/2]
=2sin(2x)/[3-cos(2x)]
∫[sin2x/(1+sin²x)] dx
=∫2sin(2x)/[3-cos(2x)]dx
=∫1/[3-cos(2x)]d(-cos(2x))
=ln[3-cos(2x)] +C
=sin(2x)/[1+(1-cos(2x))/2]
=2sin(2x)/[3-cos(2x)]
∫[sin2x/(1+sin²x)] dx
=∫2sin(2x)/[3-cos(2x)]dx
=∫1/[3-cos(2x)]d(-cos(2x))
=ln[3-cos(2x)] +C
本回答被网友采纳
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
∫sin2x/(1+sin^2x)dx
= ∫2sinxcosx/(1+sin^2x)dx
= ∫2sinxdsinx/(1+sin^2x)
= ∫dsin^2x/(1+sin^2x)
= ln(1+sin^2x) + c
= ∫2sinxcosx/(1+sin^2x)dx
= ∫2sinxdsinx/(1+sin^2x)
= ∫dsin^2x/(1+sin^2x)
= ln(1+sin^2x) + c
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