The displacement of a particle is represented by the equation y = 3 cos \(\left( {\frac{\pi }{4} - 2\omega t}\right) \) . The motion of the particle is:
1
Simple harmonic with period \(\frac{2\pi}{\omega}\)
2
Simple harmonic with period \(\frac{\pi}{\omega}\)
3
Periodic but not Simple harmonic
4
Non-periodic