求极限 lim x趋于0 tan2x+sinx/x

问题描述:

求极限 lim x趋于0 tan2x+sinx/x

lim(x->0)(tanx+tanx)/(1-tan^2x)=lim(x->)0(2x)/(1-x^2)=0,
lim(x->0)sinx/x=1,
0+1=1