-tan xdx-|||-c.tan xdx-|||-D. -tan x +

int (tan )^4xdx; ;

(tan )^3xsec xdx..

15) int tan^10xcdotsec^2xdx;15) $\int \tan^{10}x\cdot\sec^{2}xdx;$

设=tan x，若在=tan x处=tan x，则=tan x.A.=tan xB.=tan xC.=tan xD.=tan x设，若在处，则.A.B.C.D.

(5) int (tan )^10xcdot (sec )^2xdx;

int tan sqrt (1+{x)^2}cdot dfrac (xdx)(sqrt {1+{x)^2}}

cos 2x(e)^-x+ sin 2x(e)^-xdx-|||-B.cos2xe^(-x)- sin 2x(e)^-xdx-|||-. cos 2x(e)^

3.求下列不定积分.-|||-(15) int (tan )^10x(sec )^2xdx

(int )_(0)^dfrac (pi {4)}(tan )^2xdx=1-dfrac (pi )(4) __-|||-__下列式子或叙述不正确的是A.B.设

已知函数(x)=tan x,则(x)=tan x ____ ．已知函数,则 ____ ．