Question

Help how to do this question!!
some alien sending me a signal... Fourier series help

Answer 1

It's periodic. What else?

Answer 2

I mean that's easy.

Answer 3

i dunnoo how to do T_T what shud i do

Answer 4

so since it says the 2nd and higher harmonics dont matter
then
i shud take the constant term and a1 and b1 term
which = Acost

Answer 5

what then???

Answer 6

Generalize the F Series.