P311,5-13 解∷H()=H1(O1+coso) H(m) ye joto la≤0 0.≥O h(t)=F[(a]=F[(oc+-cos--O) C —O =F[H1()+H1(O)(e"+e 2 h1()=F[H1(o)=Sa(o2(t-t0)P311,5-13 c c j t e        − 0...... . 0 = = + ( ) : ( ) ( )(1 cos )       i c i H 解 H H cos )] 2 1 ( ) [ ( )] [ ( )(1 1 1      c F H F Hi h t = = + − − )] 2 1 ( )( 2 1 [ ( ) 1         c c j j i i i F H H e e − − = + + ( ) [ ( )] ( ( )) 0 1 h t F H Sa t t c c i = i = − −     