57. 若要表示一個正弦波的電壓波形 v(t)，其峰值為 100V，頻率為 100Hz，相位為 100°，則下列何者正確？ [地方特考 112] (A)v(t) = 100sin(628t + 100°)V (B)v(t) = 100sin(100t + 100°)V (C)v(t) = 70.7sin(628t + 100°)V (D)v(t) = 70.7sin(100t + 100°)V