求下列的函数周期(1)y=3sinx,x属于R (2)y=cos2x,x属于R (3)y=2sin(1/2x-π/6),x属于R

问题描述:

求下列的函数周期(1)y=3sinx,x属于R (2)y=cos2x,x属于R (3)y=2sin(1/2x-π/6),x属于R

1.T=2π
2.T=π/2=π
3.T=2π/(1/2)=4π