同理 O j∠φ(jo) B e 2 将B、D代入(5-5)则 j[ot+∠p(jo) 川ot+∠p(10)2, () e e 2 io)4co(a+∠0o 兀、 =(o)4sin(o+∠0(o) A sin(at+o)7 同理 B [ ( ) ] 2 ( ) 2 j j r j A e 将B、D代入(5-5)则 [ ( ) ] [ ( ) ] 2 2 ( ) ( ) ( 2 j t j j t j s r j c t A e e ( ) cos( ( ) ) 2 r j A t j ( ) sin( ( )) r j A t j A sin(t ) c (5-6)