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))
2.求下列函数的极值:-|||-(6) (x)=sin x+cos x(-dfrac (pi )(2)leqslant xleqslant dfrac (pi
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 (
1.试求函数 =(int )_(0)^xsin tdt 当 x=0 及 =dfrac (pi )(4) 时的导数.
2.求微分方程 =dfrac (y)(x)+tan dfrac (y)(x), 满足 |,x|=dfrac (pi )(6) 的特解.
设(x)=sin x, 则(dfrac (pi )(2))= __-|||-_.-|||-A cos dfrac (pi )(2)-|||-B o-|||-C-
设(X,Y)的分布函数为(x,y)=dfrac (1)({pi )^2}(dfrac (pi )(2)+arctan dfrac (x)(2))(dfrac (
已知 cos (dfrac (pi )(4)+x)=dfrac (3)(5), 求sin2x的值.
已知函数 (x)=dfrac (1)(2)sin (2x-dfrac (pi )(3)) x∈R,-|||-(1)求f(x)的最小正周期;-|||-(2)求f(
(int )_(0)^dfrac (pi {4)}dfrac (x)(1+cos 2x)dx=( ) .(int )_(0)^dfrac (pi {4)}dfr