求lim(x→π/4) （sin2x-cos2x-1）/(cosx-sinx)的极限

求lim(x→0) (x+sin2x)/(x-sin2x) 求极限 lim(sin2x/sin3x) x->π 求lim(x→π/4) （sin2x-cos2x-1）/(cosx-sinx)的极限 求极限lim(x→π/4) 1+sin2x/1-cos4x lim(x→π/4)(sin2x)^3极限是多少? 求极限 lim x→π/2 (sin2x)^3 lim x→0 根号(1+x^2)-1/x 求极限 lim(sin2x/sin3x)x->0x→0 求lim(n→0)[sin2x/x-xsin(2/x)] lim sin2x/tan3x 求极限?(x→0) 求(x→0)lim(sin2x/sin5x)的极限, 求(x→∞)lim(sin2x/sin5x)的极限, lim sin2x／sin5x (x→0),求详细过程 求极限lim [根号(4+x)-2]/sin2x n->0 lim x-0 sin2x/x 求极限 lim[x→∞](sin2x)/x=? lim（ x→0）sin2x / tan3x sin2x lim ------- x→0 tan3x 求极限 lim(x→0){x[sin(1/x^2)-1/sin2x]}