sin(x)的周期为:T=2π;对称轴为:X=π/2+nπ(n为整数).
sin(2x)的周期为:T/2=π;对称轴为:X/2=π/4+nπ/2(n为整数).
sin(2x+π/3)=sin(2(x+π/6))的周期为:T/2=π;对称轴为:X/2-π/6=π/12+nπ/2(n为整数).
选D.
sin(x)的周期为:T=2π;对称轴为:X=π/2+nπ(n为整数).
sin(2x)的周期为:T/2=π;对称轴为:X/2=π/4+nπ/2(n为整数).
sin(2x+π/3)=sin(2(x+π/6))的周期为:T/2=π;对称轴为:X/2-π/6=π/12+nπ/2(n为整数).
选D.