iax e mix Too i(a-d)x i(a+A)x e x 2 too cos(a-1)x+isin(a-n)x-cos(a+n)x+isin(a+n)x dx 00 fix 2/t sin(a-n)x dx+ topsin(a+n)x x 2x 0 2x tosin(a-2)x dx+ too sin(a+n)x x 0 2x 0 2x0.8 1 0.6 0.4 0.2 0 x t 0 0.5 1 1.5 2 −1 −0.5 0 0.5 1 n 12 2 iax iax e e i x e dx ix  − + − − − =  ( ) ( ) 2 i a x i a x e e dx ix − − +   + − − =  cos( ) sin( ) cos( ) sin( ) 2 a x i a x a x i a x dx ix +     − − + − − + + + =  0 0 0 0 sin( ) sin( ) 2 2 2 sin( ) sin( ) 2 2 a x a x dx dx x x a x a x dx dx x x     + + + +   − + = +     − + = +    