engineering recuitment BEL Probationary Engineers Mock Test 2025 Signals and Systems Introduction To Signals and Systems Classification of Signals
The period of the signal x(t) = cos(2πt) cos(4πt) – sin(2πt) sin(4πt) is
1
1/3 sec
2
1/6 sec
3
1/8 sec
4
cannot be determined