A system with input x [n] and output y [n] is given as y [n] = $\left( sin\dfrac{5}{6} \pi n \right)$x (n). The system is
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A system with input x [n] and output y [n] is given as y [n] = $\left( sin\dfrac{5}{6} \pi n \right)$x (n). The system is