求极限:(x→1) lim(1-X)tg(π/2x)tg(π/2 x）等价于pai/2x :(x→1) lim(1-X)tg(π/2x) =lim(x->1)(1-x)pai/2x =lim（x->1)pai/2x-pai/2 =pai/2-pai/2 =0上面的做法错在哪里?(x→1) lim(1-X)tg(π/2 x) =lim(1-X)*cot(π/2-π/2 x) =lim(1-X)/tan(π

求极限x->0lim(tg^2(2x)/x^3)(1-x/(e^x-1)) 求极限:(x→1) lim(1-X)tg(π/2x)tg(π/2 x）等价于pai/2x :(x→1) lim(1-X)tg(π/2x) =lim(x->1)(1-x)pai/2x =lim（x->1)pai/2x-pai/2 =pai/2-pai/2 =0上面的做法错在哪里?(x→1) lim(1-X)tg(π/2 x) =lim(1-X)*cot(π/2-π/2 x) =lim(1-X)/tan(π 求极限lim x→∞ (x/(1+x))^x 求极限lim Ln(1+x) /x > .< x→0 lim(1-x)^3/x 求极限~ 求极限lim(x→0)sinxsin(1/x);lim(x→∞)(arctanx/x) 求极限lim(x→0)x²/1-cosx 求极限：lim(x→+∞)[ln(x+1)-lnx] 求极限lim(x→0) cos(1/x) 求lim(1-cos2x)/x^2极限,x→0 求极限lim(x→0)(cosx-(1/x)) 求极限lim x→0 (1/xsinx+xsin1/x) 求极限lim(x→0) (1-sinx)^(2/x) lim x→∞ xsin(1/x)求极限 求极限 lim(x→0)(1-sinx)^(2/x) lim(1+tan×)^1/x求极限 求极限lim→0（1/x）求详解? 求极限lim(x→无穷)(1+1/(1-x))^2x利用重要极限求解