Question

24. A particle moves on the x-axis according to the
equation x = 2xocos3ot where x is position of
particle at any time 't. The motion is simple
harmonic
(1) With time period 2π/w
(2) With amplitude xo
(3) With time period 2π/3w
(4) With amplitude 4xo​

Answer 1

I think option 3 is the right answer for your question