Find the fundamental period t and the fundamental frequency

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Reference no: EM13273796

Are these signals periodic, find their fundamental period T and their fundamental frequency, otherwise prove that they are non-periodic
1) x(t)= 4 cos(12 t+40) + sin(16 t)
2) x(t)=cos4t +3e-j12t
3) x(t)= ej(10t+π/3)
4) x(t)= ejt +ej3t +sin(6t)

Reference no: EM13273796

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