g F(s)=∫。f)e"a 1 8(t) 1/s 1 s+a 0 sin(@t) 2+2 S cos(wt) s2+0 t" n! n+1 K K 2|Kle“cos(ot+∠K) s+a-j@ s+a+j@j j 2 | | e cos( ) ! cos( ) sin( ) 1 e ( ) 1/ ( ) 1 ( ) ( ) ( )e d 1 2 2 2 2 0                + + + + − +  + + + = − + −  −  − s K s K K t K s n t s s t s t s t s t f t F s f t t t n n t s t