求极限: lim Incotx / Inx

lim x -0

第1个回答  2014-05-17
x-->+0: limlncotx/lnx=lim[-(cscx)^2*(1/cotx)/(1/x)] =lim[-x/(sinxcosx)] =-lim(x/sinx)*1/limcosx =-1*1 =-1