求极限:lim sin(x+y),(x,y)→(0,0)$(acontent)

lim[1+sin(xy)]^(y/x)x趋于0 y趋于π,求极限 求极限:lim sin(x+y),(x,y)→(0,0)$(acontent) 求极限,lim x趋于0 x * sin 1/x 求极限lim(x-->0)x^2 sin(1/x), 求极限lim(x趋于0时)sin(sinx)/x 求极限 lim (x->0) sin(sinx)/x 求极限lim(x-->0) (tanX-sinX)/[(sin^3)X] 求极限：lim(x*sin(1/x))^2 lim x->0(sqrt(sin(1/x^2)) 求极限 怎么求多元函数极限lim sin（xy）(x,y)->(0,0) ------- 怎么求这个极限啊?x 求二元函数极限 x→0,y→0,lim [(x+y)sin(1/x)cos(1/y)] 二元函数求极限：lim sin（x^2+y）/(x^2+y^2) x→0,y→0 lim(x^2+y^2)sin(1/(x^2+y^2))X趋向0，Y趋向0 求此极限 二元函数求极限：lim (sin（x^2+y）) / (x^2+y^2) x→0,y→0 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[sin(xy)/xy],x趋向2,y趋向0,求极限 求极限 lim x→0 y→0[x^2+y^2+5/x+y sin(x+y)] 不懂极限, 1.求极限lim(趋于无穷大)(sin(x+1)/x+1) 2.设y=sine^+e^cos2x 求Y