Which of the given signals are periodic?

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answerhappygod
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Which of the given signals are periodic?

Post by answerhappygod »

a) x(t) = 4 cos(5πt)
b) x(t) = u(t) – 1/2
c) x(t) = 4u(t) + 2sin(3t)
d) x[n] = 2sin(3n)
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