lim(x →0)tan2x/x

lim(x →0)tan2x/x lim(x →0)sin3x/tan2x lim sin4x/tan2x x→0 高数极限 lim(x→0)tan2x/3x 求 lim(x→0+）（tan2x)^x lim(x→ 0)tan2x-sinx/根号(1+x)-1 高数极限 lim(x→0)tan2x/3x lim(x→0)tan2x/3x的具体答案 lim（x →0）sin5x/tan2x怎么求, lim x→0(tan2x/tan5x)的极限怎么求? x→0+时 求lim ln(tan3x)/ln(tan2x) lim(x->0) (sin2x)/(tan2x)2/3 x趋向于0 lim(tan2x/tan4x) 求lim x→0 (tan2x-sinx)/x以及lim x→0 (cosx-cos3x)/x^2 lim x→0,[√(x^2+ x+ 1)-1]/tan2x 求极限 lim x趋于0 tan2x+sinx/x lim x—0 (tan2x)/7x详细过程 x→0时,lim{lncos2x / lncos3x} =lim{ (lncos2x )' / (lncos3x)' } =lim{ 2tan2x / 3tan3x}我想问下(lncos2x )'=2tan2x的具体步骤