engineering recuitment GATE EE 2023-24 Test Series Signals and Systems Introduction To Signals and Systems Classification of Signals
Consider a signal x (t) = 5 cos \(\left( {\frac{{2π t}}{3}} \right)\)+ 9 sin (0.5π t) + 3 sin \(\left( {\frac{{\pi t}}{3} - \frac{\pi }{6}} \right)\)+ 12. Identify the valid statement for x (t).
1
x(t) is periodic with frequency (1/12) Hz
2
x(t) is periodic with period 1.2s
3
x(t) is not periodic
4
x(t) is periodic with frequency 12 Hz