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Question

Which of the given signals are periodic?

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)

Posted under Digital Communication

Answer: (a).x(t) = 4 cos(5πt)

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Q. Which of the given signals are periodic?