几道极限题!
问题描述：
几道极限题!
1,lim(x->1)(1-x)tanπ/2
2,lim(x->0)(tanx-sinx)/x^3
答
1,lim(x->1)(1-x)tanπ/2
lim12x/12*1tbanπ*1/3x
2,lim(x->0)(tanx-sinx)/x^3
lim20x2xtansixn/30x