2. (2022秋•上城区校级期末)已知曲线C1:y=sin(2x+2π3){C_1}:y=\sin ({2x+\frac{2\pi }{3}})C1:y=sin(2x+32π),C2:y=sinxC_{2}:y=\sin xC2:y=sinx,则下面结论正确的是((( )))