34.試求i(t)的穩態:

(A) i = 0.171 cos(3t +63°) A
(B) i= 0.151cos(3t +57°) A
(C) i =0.131cos(3t +52°) A
(D) i = 0.111 cos(3t +47°) А 

相關試題

相關試卷