limx→+∞ sin(π/x)*sinπx的极限

limx→+∞ sin(π/x)*sinπx的极限 limx→0 sin［sin（sinx）］/x 求3个极限:limx→0 sin3x/2x=?limx→∞ xsin(1/x)=?limx→0 [sin(1/x)]/(1/x)=? limx→0x/Sin(x/2)的极限是什么 limx→∞x*sin(2x/(x^2+1))的极限 limx→0 tan(tanx)-sin(sinx)/x^3 limx→a -sin[(x+a)/2] =-sina为什么 limx→0[sinx-sin(sinx)]sinx/x^4 limx→0(sin³x/sinx³)= 求limx→∞（1/x）*sin(1/x)的极限求详解 求极限limx→0 (cosx)^1/sin^2x求极限limx→0 (cosx)^(1/sin^2x) limx->a (sinx-sina)/sin(x-a) 求极限1.limx→-1(x^3+1)/sin(x+1); 2.limx→0(e^x-e^-x)/(sinx); 3.limx→+∞(ln(1+1/x))/(arccotx);4.limx→∞(tanx-sinx)/(1-cos2x); 求极限limx→∞sin^2 *(π×根号下n^2 +n) 求极限limx→0(e^x一1一x)^2/tanx*sin^3x 求极限 limx→4 sin（x-4）/x^2-2x-8 limx→2(x^2-4)/sin(x-2),求极限 计算limx→1 sin(x-1)/x²-1=?