A.2kπ,k為整數(shù) B.2kπ+π/2,k為整數(shù) C.2kπ+π,k為整數(shù) D.2kπ+3π/2,k為整數(shù)
A.π/3 B.4π/3 C.-π/3 D.-4π/3
A.-Aωsinφ B.Aωsinφ C.-Aωcosφ D.Aωcosφ