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

求下列不定积分:-|||-(22) int dfrac (cos 2x)({cos )^2x(sin )^2x}dx ;

[题目]如果 (cos x)=dfrac ({sin )^2x}(cos 2x), 则 f(x)= () )-|||-

sin^2x+cos^2x=_____$$sin^2x+cos^2x=$$_____

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

)int dfrac (1)({cos )^2x(sin )^2x}dx.

[题目] (sin )^2x+(cos )^2x= __

(B.) y = (1)/(2)x^2e^2x + sin 2x. (C.) y = (x)/(2)(x + 4)e^3x. (D.) y = (x^2co

曲线=x+(sin )^2x在=x+(sin )^2x处的切线方程是________。曲线在处的切线方程是________。

(sin x)=dfrac (1)({cos )^2x} in (0,dfrac (pi )(2)),则(sin x)=dfrac (1)({cos )^2x}

[题目] lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac ({cos )^2x}({x)^2})= __