Snm0t>jn[(+o0)-6(0-00) cOS Oota(1)分[x(+00)+o(-00)*[o(O)+ 2丌 [6(O+O0)+(-00)+ 2j(+00)2j( j(0-00 [6(0+00)+8(0-00-/o 类似地 sino0t6(1)4>[(a+o0)-o(o-00)+ 0-asin [ ( ) ( )] 0     +0 −  −0 t j 2 2 0 0 0 0 0 0 0 0 0 0 [ ( ) ( )] 2 2 ( ) 1 2 ( ) 1 [ ( ) ( )] 2 ] 1 [ ( ) ( )] [ ( ) 2 1 cos ( )                                     − = + + − + − + + = + + − +  + + −  + j j j j t t 类似地 2 2 0 0 0 0 0 [ ( ) ( )] 2 sin ( )             −  + − − + j t t