Well i found this question in my tutorial:
f(t) = 5[H(t-3) - H(t-11)], find the fourier transform.
Ans: (-10/w)(sin w)exp(-2iw)
i am totally blur on how to even start. I tried the general method of fourier transform but got no closer to the answer.
integrate from 3 to 5 for 5.exp(-iwt)
Couldn't find any table with Fourier transform for H(t-a).
All help are appreciated.