求limx→0(根号2-根号(1+cosx))/(sin3x)^2的极限
来源:学生作业帮 编辑:拍题作业网作业帮 分类:数学作业 时间:2024/04/28 00:40:06
求limx→0(根号2-根号(1+cosx))/(sin3x)^2的极限
求详解
求详解
limx→0(√2-√(1+cosx))/(sin3x)^2=lim(1-cosx)/[(sin3x)^2(√2+√(1+cosx))]
=lim(1-(1-2sin^2(x/2)))/[(sin3x)^2(√2+√(1+cosx))]
=lim2sin^2(x/2)/[(sin3x)^2(√2+√(1+cosx))]
=lim2sin^2(x/2)*1/4/(x/2)^2/[(sin3x)^2*9/(3x)^2*(√2+√(1+cosx))]
=2*1/4/9/2√2=√2/72
=lim(1-(1-2sin^2(x/2)))/[(sin3x)^2(√2+√(1+cosx))]
=lim2sin^2(x/2)/[(sin3x)^2(√2+√(1+cosx))]
=lim2sin^2(x/2)*1/4/(x/2)^2/[(sin3x)^2*9/(3x)^2*(√2+√(1+cosx))]
=2*1/4/9/2√2=√2/72
求limx→0(根号2-根号(1+cosx))/(sin3x)^2的极限
limx→0sin3x/sin5x,求极限
求极限 x趋于0^+ lim sin3x/根号下(1-cosx) 利用等价无穷小的性质 求
求极限limx→0 (cosx)^1/sin^2x
求极限:limx→0 (1-cosx)/2x
求limx趋近于0 1-根号cosx/x^2 的极限值
求极限 limx根号3-5的根号3/x根号2-5的根号2 x→5
limx→+∞(根号x^2+x+1-根号x^2-x-3) 求极限
limx趋近于0 (根号2-根号下1+cosx)除以sinx的平方
求limx→+∞ In(1+e^x)/根号(1+x^2)的极限和limx→+∞(2+e^x)^-1/x的极限 用洛必达法
根号下1-cosX^2除以1-cosX的极限怎么求 X趋于0
limx→0+ ln(sin3x)/lnsinx 求极限