lim(x→0)[tan(2x+x^3)/sin(x-x^2)] 和lim(x→0)[(x-sinx)/(x+sinx)]的答案和解法如果错了请教教我怎麽解和解的过程.

lim(x→0)[tan(2x+x^3)/sin(x-x^2)] lim x→0 (cot x)^tan 2x= lim x->0 (sin x-tan x)/sin (x^3) lim(x→0)(1+3tan^2(x))^cot^2(x)=? 数学极限lim(x→0)((x^3)/(3*x^2-1)) lim(x→+无穷)(√x(x+2)-√(x^2-x+1)) lim(x→1)(tan(x-1))/(x^2-1) lim(x→0)tan(x)ln(1+x)=? lim(x→1) (1-x)tan(π/2)x lim(x→0) [1-cos(x^2)]/sin(x^2)tan(x^2)]=? lim(x→0)(e^tan x-e^sin x)/x^3,rt lim(tan^3(3x)/(X^2sin(2x))(x趋近于0） 1.lim x→0,(tanx-sinx)/(sin2x)^3 2.lim x→0,sin(x-1)tan(x-1)/2(x-1)lnx .. 1.计算lim(1/x2-cot2x) X→0 2 lim(1-x)tanπx/2x→1 lim(2-x)tanπ/4x 求极限lim┬(x→0)?〖(tan?x lim (x→0) [tan( π/4 - x )]^(cotx)=? lim x→-2 (tanπx)/(x+2) 2.lim x→0 cot2xcot[(π/2)-x] 3.lim x→π/3 (1-2cosx)/(π-3x) lim(1+3tan²x)^cot²x (x→0) 求lim(x->0)(1+3(tan^2)x)^((cot^2)x)