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Today at 12:44 PM
Computers and Technology

Answered

V(t)=5 cos wt + 2 ? Is this ac or dc ? And why ?

Answer :

Аноним Аноним

Today at 12:50 PM

Answer:

this is AC b/c.... cos is a periodic function.. think waves... the voltage is going to vary between positive 5 and negative 5 volts... so it's a low voltage signal, but still AC, the W is for how fast it's varying and the +2 is the off set of the wave.

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