Question

Can someone help me here?

Answer 1

i think its c

Answer 2

there is not i think in math either say it is or not and stay your reasoning
and above all you don't just give answer see open study code of conduct

Answer 3

at any rate, i was having issues understanding the question itself
what do they mean by sample period!

Answer 4

any lecture notes about this sample period?

Answer 5

The answer is A

Answer 6

hmm alright

Answer 7

it is not A
need to solve cos (t/3-5pi/6)=1
saying because that would be the starting point of any normal cos function with positive inputs

Answer 8

when does this happen
when t/3-5pi/6=0
so for t=5pi/2 after multiplying by 3

Answer 9

so when t=5pi/2 f(5pi/2)=3
therefore the starting point is (5pi/2, 3)

Answer 10

should be the D
there one think that is lacking here which is sample period
don't know what do they mean here. But that does not change the answer