lim（x->π/2)xtanx/tan3x

lim（x->π/2)xtanx/tan3x 极限lim（ x→π/2） xtanx / tan3x 6.lim/xtanx x-0 求解一道高数极限题lim[tan(x+h)-2tanx+tan(x-h)]/h² h→0 答案为2sec²xtanx求细节 lim xtanx/tan3x当x无限大时 lim(2-x)tanπ/4x lim(X趋向于0）（X平方/1-XtanX/1)写错了，是lim(X趋向于0）（1/x^2-1/XtanX) lim(根号下(1+sin^2x)-1)/xtanx x趋于0 极限中无穷小量代换和高阶无穷小量略去问题Lim (1/x^2-cot^2x)=lim (1/x^2-1/tan^2x)=lim(tan^2x-x^2)/x^2*tan^2x=lim(tan^2x-x^2)/x^4=lim(tan^2x/x^4)=lim2tanxsec^2x/4x^3=lim2xsec^2x/4x^3=limsec^2/2x^2=lim2sec^2xtanx/4x=limsec^2x*x/2x=lim 求极限中无穷小代换和高阶无穷小略去问题Lim (1/x^2-cot^2x)=lim (1/x^2-1/tan^2x)=lim(tan^2x-x^2)/x^2*tan^2x=lim(tan^2x-x^2)/x^4=lim(tan^2x/x^4)=lim2tanxsec^2x/4x^3=lim2xsec^2x/4x^3=limsec^2/2x^2=lim2sec^2xtanx/4x=limsec^2x*x/2x=limsec lim(2-x)^tanπx/2 x趋近1 lim(x→1) (1-x)tan(π/2)x 求救..是不是要用到诺必达法则?lim xtanx / tan3xx→π/2 求极限Lim(x→0)1/xsinx-1/xtanx (1-x)tan(πx/2),lim 趋向于1, 当x→0时lim(1/x∧2-1/xtanx) 这个极限是多少啊?当x→0时lim(1/x∧2-1/xtanx) 这是极限是多少啊?不甚感激啊 x→1,求lim（tanπx/4）^tanπx/2求极限, 求极限：lim(1-x)tan Π/2