解(4得 i0,)=40)cd0+80ao() (5)代入(7) A(o)=0(0) (,1)=0o)0sa0+B(o) sin aot(7) (6)代入(7): Blo ao=vla ∴B()=-v(o)解(4)得 ( , ) ( )cos ( )sin (7) ~ u w t = A w awt + B w awt (5)代入(7): (w) j(w) ~ A = ( ) ( )cos ( )sin (7 ) ~ , ~ \u w t = j w awt + B w awt ¢ (6)代入(7): (w) w y(w) ~ B a = ( ) y( ) w w w 1 ~ a \B =