lim(x->1/2)sin(1-2x)tanπx

lim(x(sin)^2) 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), 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→-1)sin(x+1)/2(x+1) 求极限：lim(x*sin(1/x))^2 lim x->0(sqrt(sin(1/x^2)) 求极限 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 lim(x---1)[sin^2(x)-sin^2(1)]/[x-1]=?大学高等数学,求教. 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->0) 1-x^2-e^(-x^2)/x*sin^(3)2x lim x趋向无穷 {（2x^3+x)sin (2/x) }/ x^2+1 lim(1+3/x^2)^sin^2x x趋近正无穷lim(1+3/x^2)^sin^2x x趋近正无穷 lim（x—+∞）(x^2*sin(1／X))／√(2x^2-1)