lim(sin2x/x)

求lim(x→0) (x+sin2x)/(x-sin2x) lim sin2x/3x x趋向0 lim x-0 sin2x/x 求极限 lim X趋近0 sin7X除以sin2X 求极限 lim(sin2x/sin3x) x->π lim(x趋向π）sin2x/tan3x sin2x lim ------- x→0 tan3x lim(X->0)sin2x/x =lim(X->0)2(sin2x/2x)=2 lim(x→0)（x-sin2x）/（x+sin5x） lim(sin2x)/(x^3+3x) x趋向于0 lim(x->0)(tan3x+2x)/(sin2x+3x) lim x→正无穷 sin2x/3x =什么