Question: x[n] is a real, causal sequence with discrete-time Fouorier transform X(e j? ). The imaginary part of X(e j? ) is? jm{ X(e j? ).}

x[n] is a real, causal sequence with discrete-time Fouorier transform X(ej?). The imaginary part of X(ej?) is?

jm{ X(ej?).} = sin ?,

and it is also known that?

> x[n] = 3.

> x[n] = 3.

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