lim(X-0) sin^2x/(x^2+x^3)=?

lim(x(sin)^2) lim(x趋向0) x^2 / (sin^2) * x/3 lim(x趋向0) x^2 / (sin^2) * x/3 lim(x趋向0)ln(1+sin x)/x^2 求极限lim(x-->0)x^2 sin(1/x), 求极限 lim sin(x^2 * sin (1/x))/x x->0求极限 lim sin(x^2 * sin (1/x))/x x->0 lim(x趋于0)(x^2-sin^2xcos^2x)/((x^2)sin^2x) lim x->0(sqrt(sin(1/x^2)) 求极限 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 lim sin 2x / sin 5x lim arctan x / xx趋近于0 x趋近于0 lim(x->0) 1-x^2-e^(-x^2)/x*sin^(3)2x lim(x→0)[tan(2x+x^3)/sin(x-x^2)] 1.lim x→0 3x/(sinx-x)2.lim x→0 (1-cosmx)/x^23.lim x→0 sin4x/[(√x+2)-√2]4.lim h →0 [sin(x+h)-sin(x-h)]/h lim x→∞ (x+sin 2x)/2 求lim(x~无限大)(sin(x^(2)+5)/x^2) lim(sin(x^2*cos(1/x)))/x怎么做? lim[(sin x)^tan x],x趋向于Pai/2 lim x->0 (sin x-tan x)/sin (x^3)