lim→x-a (sin^2x-sin^2a)/(x-a)

lim(x(sin)^2) lim→x-a (sin^2x-sin^2a)/(x-a) lim x趋于0 [sin(a+x)sin(a+2x)-sin^2a]/x 求极限不用洛必达法则 lim x→∞ (x+sin 2x)/2 lim（x→2）x-2 /sin( (lim→-1)sin(x+1)/2(x+1) 请教一道函数极限问题：lim[sin√（x^2+1)-sin(x)] (x→+∞) lim→0 sin^3/x^3 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 lim(x→0)×(x-sin²3x)/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(x+2)/x^2 (x→oo)lim 1/sin(x-2) (x→2) 求 lim(x→1)sin(x+1)/x+1 求 lim(x→2)x²-4/x-2 利用无穷小的性质计算下列极限lim sinx-sina/x-a(x→∞）还有一道：lim(1-x^2)/sinπx x→1 lim x->0 (sin x-tan x)/sin (x^3) 设lim(x→1)sin(x∨2-1)/x∨3-a=2/3.求a lim(x->0)∫sin(sqrt(t))dt/x^a, lim(x→0)[tan(2x+x^3)/sin(x-x^2)]