lim x趋向于0 分母为sin^2 (x/5) 分子为x^2

当x趋向π lim (sin 3x )/( sin 2x) 的极限为? 二元函数求极限,分子为2-根号下（x+4）,分母为xy,xy均趋向于0 lim(x趋向0)ln(1+sin x)/x^2 求极限lim(x趋向于0)ln(1+x^2)/sin(1+x^2) 求lim (sin^2x+x)/(cos^2x-x) x趋向于无穷 lim(sin△x/2)/△x,在△x趋向0时,为1/2 证明过程 x趋向于无穷时 lim (3x-1)/(x^3 乘以 sin(1/x^2 )) lim((1+x)^5-(1+5x))/(x^2+x^5) x趋向于0 高数求极限.x趋向于零,lim(sin^2x-x^2cos^2x)/x^2sin^2x , lim（2-x/2）^2/x,其中x趋向于0,求极限,结果为e^-1 求lim x趋向于0(arctanx)/(x^2+1) lim(1-2^x)^sinx x趋向于－0