lim[(1-cosx*cos2x****cosnx)/x^2]在x趋于0时
lim[(1-cosx*cos2x****cosnx)/x^2]在x趋于0时
lim(cosx+cos2x+ cos3x+…+ cos nx-n)/(cosx-1) (x趋于0)
求极限 x 趋于0 lim(cosx)^1/(x^2)
求证:cosx+cos2x+...+cosnx={[cos(n+1)x/2]*[sin(n/2)x]}/[sin(x/2
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lim x趋于0 (sinx+x^2sin1/x)/[(1+cosx)ln(1+x)]
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lim x趋于0 根号(1-cosx^2)/根号(1-cosx)
lim x趋于0,sinx/(1+cosx)等于多少?
x趋于0,求lim√(1+cosx),
求lim x趋于0 时(x-sinx)/[(e^2x-1)(1-cosx)]的详细过程.
x趋于0时求lim(sin/x)^(1/[1-cosx])