lim sin 2x / sin 5x lim arctan x / xx趋近于0 x趋近于0

lim(x(sin)^2) 求lim(x~无限大)(sin(x^(2)+5)/x^2) lim sin 2x / sin 5x lim arctan x / xx趋近于0 x趋近于0 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->0 (sin x-tan x)/sin (x^3) lim x→∞ (x+sin 2x)/2 lim(x趋向0) x^2 / (sin^2) * x/3 lim(x趋向0) x^2 / (sin^2) * x/3 lim(sin(x^2*cos(1/x)))/x怎么做? lim(x趋向0)ln(1+sin x)/x^2 求极限lim(x-->0)x^2 sin(1/x), lim[(sin x)^tan x],x趋向于Pai/2 lim(x趋于0)(x^2-sin^2xcos^2x)/((x^2)sin^2x) lim[(x+sin x/)/(x+sin 5x)],x无限趋近于0.烦请写出步骤. lim(3*x^2+5)/(5x+3)sin(2/x)=多少?lim(3*x^2+5)/(5x+3)*sin(2/x)=多少？ 求极限lim [(2x+6)sin(5/x)]/(4x+3) x+∞ lim(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷 lim（x→2）x-2 /sin(