Please help me solve following question thanks determine if
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).
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