lim(x→1) sin^2(x-1)／x-1 求极限

(lim→-1)sin(x+1)/2(x+1) 求 lim(x→1)sin(x+1)/x+1 求 lim(x→2)x²-4/x-2 lim x(x+2)/x^2 (x→oo)lim 1/sin(x-2) (x→2) 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 请教一道函数极限问题：lim[sin√（x^2+1)-sin(x)] (x→+∞) 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(1/X) lim （x→0）x sin 1/x= 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(x(sin)^2) 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→1) (sin(x-1))/(x^2+x-1)的极限值, lim(x→0) [1-cos(x^2)]/sin(x^2)tan(x^2)]=? 求 lim(x→∞)[sin(2/x)+cos(1/x)]^x的极限. lim(n→1)sin(1-x)/(x^3-1) 求极限：lim(x*sin(1/x))^2