12. 若v (t)=v1 (t)+v2 (t),則v (t)為下列何者?
(A)10
sin(200πt ) V
(B)10
cos(200πt ) V
(C)10
cos(100πt ) V
(D)10sin(200πt ) V
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統計: A(26), B(12), C(8), D(10), E(0) #3433801
統計: A(26), B(12), C(8), D(10), E(0) #3433801