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Consider the signal $x[n]=\sin(2\pi n)u[n]$, where $u[n]= \left\{ \begin{array}{rcl} 1 & n=0,1,2,3\dots \\ 0 & otherwise\end{array}\right. $

The period of this signal $x[n]$ is ___________.

  1. $4$
  2. $3$
  3. $2$
  4. $1$
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