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Which of the given signals are periodic?

Posted: Thu Jul 14, 2022 9:47 am
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)