44.有一RLC串聯電路,接於電壓為v(t)=120cos(377t−15°)V之電源,經量測得知電流為i(t)=6cos(377t+30°)A,則電阻兩端的電壓峰值為何? (A) 120V (B) 120 V (C) 100V (D) 100 V