lim (x→0) [tan( π/4 - x )]^(cotx)= lim(x→0){e^[cotx*ln(tan(π/4-x))]}只需要求lim(x→0)[cotx*ln(tan(π/4-x))]；lim(x→0)[cotx*ln(tan(π/4-x))]=lim(x→0)[ln(tan(π/4-x))/tanx]=lim(x→0)[(tan(π/4-x)-...