lim[x→1] tan(x-1)-sin(x-1) / x-1=

lim(x→1) (1-x)tan(π/2)x lim(x→0)tan(x)ln(1+x)=? x→1,求lim（tanπx/4）^tanπx/2求极限, lim(1+tan×)^1/x求极限 lim(2-x)^tanπx/2 x趋近1 1.计算lim(1/x2-cot2x) X→0 2 lim(1-x)tanπx/2x→1 lim[x→1] tan(x-1)-sin(x-1) / x-1= lim(x→0) [1-cos(x^2)]/sin(x^2)tan(x^2)]=? (1-x)tan(πx/2),lim 趋向于1, 求极限lim(x→-1) (x的立方+1)/[tan(x+1)] 求lim(1-x)tan(∏x/2),x→1的极限 lim(x→-1)【ln(tan派x/2)/ln(1-x)】 lim(x→1)(x-1)tanπx/2=?请不要用洛必达法则. lim（x→1）（1-x^2）tanπx/2 lim(x-1)tan∏x/2 （x→1） 求lim(1-x)tanπx/2 x→1 求x→1时lim（2-x）^tan（πx）/2的极限 lim(1+3tan²x)^cot²x (x→0)