设=sin 2x+(ln )^3x，求=sin 2x+(ln )^3x

设=sin 2x+(ln )^3x，求=sin 2x+(ln )^3x设，求

求极限 lim _(xarrow 0)dfrac (ln (1+{x)^2)-ln (1+(sin )^2x)}(x{sin )^3x}

lim _(xarrow 0)dfrac (ln ({sin )^2x+(e)^x)-x}(ln ({x)^2+(e)^2x)-2x}

6.求下列极限:-|||-lim _(xarrow 0)dfrac (ln ({sin )^2x+(e)^x)-x}(ln ({e)^2x-(x)^2)-2x}

设=sin 2x+(e)^cos x，求y设，求y'

int ((x)^2-1)sin 2xdx.-|||-18. int dfrac ({ln )^3x}({x)^2}dx.

[题目] (sin )^2x+(cos )^2x= __

下列函数中,是偶函数的是() ()-|||-(A) (x)=((x)^2+1)(sin )^3x (B) (x)=ln (x+sqrt ({x)^2+(a)^2

若函数=sin 3x，则=sin 3x_____.若函数，则_____.

求极限: lim _(xarrow 0)((1+2x))^dfrac (1{sin 3x)}=