求
.
求.
int dfrac (sin x-cos x)(sin x+cos x)dx==
int dfrac (sin x+cos x)(sqrt [3]{sin x-cos x)}dx
(11) int dfrac (sin x+cos x)(sqrt [3]{sin x-cos x)}dx
计算不定积分int (x+cos x)dx=（）A int (x+cos x)dx=B int (x+cos x)dx= C int (x+cos x)dx=
14.int(sin x+3cos x)/(2sin x+cos x)dx=____14.$\int\frac{\sin x+3\cos x}{2\sin x+
)int dfrac (1)({cos )^2x(sin )^2x}dx.
int dfrac (cos 2x)(cos x+sin x)dx
int dfrac (sin x)({cos )^3x}dx=______.______.
计算int dfrac (dx)(cos x(1+sin x))计算
(13 ) int dfrac (sin x)({cos )^3x}dx;