lim cot/linx x趋近0+0

lim cot/linx x趋近0+0 lim x趋近0 cot（x）求xcotx 求极限LIM（趋近与0）(cot^2 *x-1/x^2)nannan na 求极限LIM（趋近与0）(cot^2 *x-1/x^2)急 lim(x趋近0)ln(x/sinx) lim x趋近0sinx/tanx-sinx lim x趋近0 (x-arcsinx)/x^3 x趋近0 lim 2^x-1/x lim＜x趋近0＞(x-sinx)/(x-tanx) lim趋近0 [(1+x)^1/x-e]/x lim x*lnx为什么等于0 x趋近0 lim( 2x-sinx)/(x +sinx)趋近0, lim(sinx-tanx)/x^2,x趋近0 lim( x趋近0,y趋近0)xy/(x+y)怎么证明极限不存在？ lim e^sin2x-e^2sinx x趋近0 x趋向0 lim(cot x- 1/x)=? lim x→0 (cot x)^tan 2x= lim(x趋向0)ln cot x|lnx等于?