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Questions  

Identify the function which represents a periodic motion.

a
e-ωt
b
eωt
c
loge(ωt)
d
sinωt + cosωt

detailed solution

Correct option is D

For periodic functionf(t) = f(t + T)where T is time period of functionsin(ωt + 2π) + cos(ωt + 2π)  = sinωt + cosωt

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