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    14.素養(4)
1 有兩個交流電壓分別為v1(t)=302 cos(377t-45°)V 和 v2(t)=302 cos(377t-135°)V,則 v1(t)+v2(t)為何? 106 統測
A 602 cos(377t-175°)V
B 602 sin(377t+90°)V
C 60cos(377t+45°)V
D 60sin(377t)V

v1(t)=302 sin(377t+45°)V

v2(t)=302 sin(377t-45°)V

v1(t) + v2(t) =60 sin(377t)V