将函数 (x)=sin (omega x+dfrac (pi )(3))(omega gt 0) 的图象向左平移 dfrac (pi )(2) 个-|||-单位长度后得到曲线C,若C关于y轴对称,则w的最小值-|||-是 ()-|||-

已知 omega gt dfrac (1)(4), 函数-|||-12. 已知 omega gt dfrac (1)(4), 函数-|||-(x)=sin (o

6.要得到函数 =sin (2x-dfrac (pi )(3)) 的图像,只需要将函数 =sin 2x 的-|||-图像-|||-A.向左平移 dfrac (p

3.要使函数φ(x )= ,dfrac {pi )(2)] (B)[π,2π] (C) [ 0,dfrac (pi )(2)] (D) [ dfrac

设(x)=sin x, 则(dfrac (pi )(2))= __-|||-_.-|||-A cos dfrac (pi )(2)-|||-B o-|||-C-

19.-|||-已知函数 (x)=Asin (omega x+varphi )(Agt 0,omega gt 0,0lt varphi lt dfrac (pi

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

如图，入射波的波函数为=Acos (omega t-dfrac (2pi )(lambda )x)-|||-__ __，在=Acos (omega t-dfra

设(X,Y)的分布函数为(x,y)=dfrac (1)({pi )^2}(dfrac (pi )(2)+arctan dfrac (x)(2))(dfrac (

2.计算下列定积分:-|||-(1) (int )_(dfrac {pi )(3)}^pi sin (x+dfrac (pi )(3))dx;-|||-(2)

( (int )_(dfrac {pi )(4)}^dfrac (pi {3)}dfrac (x)({sin )^2x}dx ;