Determine whether or not each of the following discrete-time signals is periodic. If the signal is periodic, determine its fundamental period.(a) x[n]=sin(8π/2 n+1),(b) x[n]=cos(r/8-π)(c) x[n]=cos(π/8 n²)(d) x[n]=cos(π/2 n) cos(π/4 n)(e) x[n]=2cos(π/4 n)+sin(π/8 n)-2cos(π/2 n+π/6)

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

what is the graph

step-by-step explanation:

about 0.75 hours

step-by-step explanation:

its the second choice.

step-by-step explanation:

the elements in the range will be 7 less than the elements in the domain.