railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Signals and Systems Introduction To Signals and Systems
A periodic function is given by a function that:
1
is a period of T = 2π
2
satisfies f(t + T) = f(t)
3
satisfies f(T + t) = -f(t)
4
is a period of T = π