?1[?]=cos(​2??/?)+2co​s(3??/?) ?2[?]=2cos​(2?/?)+cos​(3?/?) ?3[?]=cos(​2??/?)+3si​n(5??/2?) Assume ?=6 for each signal. Determine whether or not each signal is periodic. • If a signal is periodic, plot the signal for two perio

plot these signals and label axis

[Jan]

Please post what you have tried so far and ask a specific question.