lim(x趋向0)(1-cos2x)/xsinx怎么解?

lim(x趋向0) 1-cos2x/xsinx lim(x趋向0)(1-cos2x)/xsinx怎么解? lim x趋向0 [x(1-cos2x)]/(5x-sin5x)?知道答案是12/125, lim(x趋向0)[1-cos(1-cos2x)]/x^4怎么解? lim(x趋向0)[1-cos(1-cos2x)]/x^4怎么解? 求极限：lim（x趋向0） [1-cosx(cos2x)^1/2(cos3x)^1/3]/[ln(1+x)-x] 求极限 （1） x趋向x/6 lim ln(2cos2x) (2) x趋向0 lim(e^x-1)/x (3) x趋向0 lim[ln(a+x)-lna]/x (a>0)(4) x趋向a lim(sinx-sina)/(x-a) （x趋向于0）lim（cosx－cos2x）/x^2 1.x趋向0 lim (cosx-1)/x 2.x趋向0 lim sinx/x lim(1-cosx)x趋向0, lim(x→0)(1-cos2x)/xsinx x趋向0 lim xcotx x趋向0 lim [ ln (1-x) / (e ^ x-1 ) ] 计算极限 lim(1-x)^1/x x趋向0 lim(1+e^1/x)^x,x趋向于+0 lim x趋向0 (1+cos^2(1/x))^x lim(1-2x)^1/x x趋向于0 lim(x^2+1)/(2x^+1) x趋向0