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Determine if the following signals are periodic

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Reference no: EM13998182

Please help me solve following question, thanks!!! Determine if the following signals are periodic and, if so, what the fundamental period is. (a) x1[n] = cos(0.8n);(b) x2[n] = cos(0.8πn+0.2π);(c) x3[n] = 3cos(0.8πn) + 4sin(0.5πn). 

Reference no: EM13998182

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