2.求下列函数在指定点的导数:-|||-(1) (x)=xsin x+dfrac (1)(2)cos x ,x=π/4;-|||-(2) (x)=dfrac (x-sin x)(x+sin x) =dfrac (pi )(2)

2.求下列函数在指定点的导数:-|||-(1)设 =f(x)=sin x-cos x, 求 (dfrac (pi )(4)), (dfrac (pi )(2))

求下列函数的导数 ( 1 ) =sin dfrac (1)(x)( 2 )=sin dfrac (1)(x)( 3 )=sin dfrac (1)(x)求下列函

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

lim _(xarrow 0)dfrac (x-sin x)(x+sin x)..

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

设((sin )^2x)=dfrac (x)(sin x)，求((sin )^2x)=dfrac (x)(sin x) .设，求.

2.求极限lim _(xarrow 0)(dfrac (1)(xsin x)-dfrac (cos x)({x)^2}) ()2.求极限

[题目]求 lim _(xarrow infty )((sin dfrac {2)(x)+cos dfrac (1)(x))}^x

已知函数(x)=asin x+dfrac (1)(4)sin 4x-|||-__，则常数(x)=asin x+dfrac (1)(4)sin 4x-|||-__

【题文】已知(x+dfrac (1)(x))=(x)^2+dfrac (1)({x)^2}，求(x+dfrac (1)(x))=(x)^2+dfrac (1)(