limx->0(sinx/x)^(1/(1-cosx))

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limx->0(sinx/x)^(1/(1-cosx))

limx->0(sinx/x)^(1/(1-cosx))
limx->0(sinx/x)^(1/(1-cosx))

limx->0(sinx/x)^(1/(1-cosx))
稍等,我给你贴图回答

1)sinx x(x→0) 2)e^x-1 x(x→0) 3)(1+x)^a-1 ax(x→=lim[x/(x+x^2+3x^3)] sinx和x是等价无穷小 1-cosx和(1/2

先e后log
x->0,log(1+x)~x
e^(1/(1-cosx))*(sinx/x-1)=e^(sinx/x-1)/(1-cosx)
对指数洛必达
(cosx*x-sinx)/x^2*sinx=(-sinx*x+cosx-cosx)/3x^2=-x^2/3x^2=-1/3
(sinx/x)^(1/(1-cosx))=e^(-1/3)