求极限lim(x→0) sin(1-x)/(1-x^2)

求极限lim(x-->0)x^2 sin(1/x), 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 lim x->0(sqrt(sin(1/x^2)) 求极限 求极限,lim x趋于0 x * sin 1/x 求极限 lim sin(x^2 * sin (1/x))/x x->0 求极限：lim x→0 ln[1+sin^2(x)]/[e^(x^2)－1] 求极限lim(x→0) sin(1-x)/(1-x^2) 求极限 lim(x→0){x[sin(1/x^2)-1/sin2x]} lim x→0 (x∧2 cscx sin(1/x)) 求极限 求 lim(x→∞)[sin(2/x)+cos(1/x)]^x的极限. 求lim x→0时(2+e^ 1/x / 1+ e^ 4/x + sin x / |x| )的极限... 求极限~lim(x→0)[(1+xsinx)^1/2-cosx]/sin^2(x/2)