試題詳解

14. 兩個電壓時間函數 v₁(t) 與 v₂(t)，若 v₁(t) 的相位超前 v₂(t) 為，則下列何者正確？(統測 112)
(A) v₁(t) = 20sin(314 t–30°)V、v₂(t) = 20cos(314 t –60°)V
(B) v₁(t) = 20cos (314 t–60°)V、v₂(t) = 20sin(314 t –30°)V
(C) v₁(t) = 20sin (314 t–30°)V、v₂(t) = 20sin(314 t –60°)V
(D) v₁(t) = 20cos (314 t–30°)V、v₂(t) = 20sin(314 t –60°)V