Hy(x)=J(x)+iN(x)te=cos x +isin x H(x)=J(x)-iN,(x)te=cos x-isin x H th e te 2 cos x H,-H; N,(x)= SIn x(1) (2) ( ) ( ) ( ) cos sin ( ) ( ) - ( ) cos - sin ix ix H x J x iN x e x i x H x J x iN x e x i x n n n n n n - = + ¬ = + = ¬ = 1 2 - ( ) cos 2 2 ix ix H H e e J x x n n n + + = ¬ = 1 2 - - - ( ) sin 2 2 ix ix H H e e N x x i i n n n = ¬ =