2个回答
展开全部
∫(sinx)^4dx
=∫[(1/2)(1-cos2x]^2dx
=(1/4)∫[1-2cos2x+(cos2x)^2]dx
=(1/4)∫[1-2cos2x+(1/2)(1+cos4x)]dx
=(3/8)∫dx-(1/2)∫cos2xdx+(1/8)∫cos4xdx
=(3/8)∫dx-(1/4)∫cos2xd2x+(1/32)∫cos4xd4x
=(3/8)x-(1/4)sin2x+(1/32)sin4x+C
=∫[(1/2)(1-cos2x]^2dx
=(1/4)∫[1-2cos2x+(cos2x)^2]dx
=(1/4)∫[1-2cos2x+(1/2)(1+cos4x)]dx
=(3/8)∫dx-(1/2)∫cos2xdx+(1/8)∫cos4xdx
=(3/8)∫dx-(1/4)∫cos2xd2x+(1/32)∫cos4xd4x
=(3/8)x-(1/4)sin2x+(1/32)sin4x+C
追问
你去吃屎吧
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