int dfrac (ln tan x)(cos xsin x)dx

int t(e)^-2tdt.-|||-.int (ln )^2xdx-|||-.int xsin xcos xdx.-|||-15. int (x)^2(co

下列计算错误的是 （）。A int dfrac (1)(x)dx=ln |x|+C B int dfrac (1)(x)dx=ln |x|+C C int df

int cos (ln x)dx..

求不定积分int dfrac (1)(2x)sqrt (ln x)dx=（）.int dfrac (1)(2x)sqrt (ln x)dx=int dfrac

[题目] int cos (ln x)dx.

设 (x)=(e)^-x, 则 int dfrac (f(ln x))(x)dx= .(x)=(e)^-x, 则 int dfrac (f(ln x))(x)

求int dfrac (cos x)(sin x+cos x)dx.求.

int dfrac (cos 2x)(cos x+sin x)dx

int dfrac (sin x-cos x)(sin x+cos x)dx==

求 int(cos2x)/(cos^2xsin^2x) dx 。求$ \int\frac{cos2x}{cos^2xsin^2x} dx $。