When t = 0, x = 12cm, the direction is positive. How long does it take to return to the equilibrium position?

When t = 0, x = 12cm, the direction is positive. How long does it take to return to the equilibrium position?

The simple harmonic motion is reciprocating, let its displacement equation be x = asin (WT + a) (CM), w = 2 π / T = π / 2, substitute a = 24, t = 0, x = 12 into the equation to get a = π / 6, that is, the displacement equation is x = 24sin (π T / 2 + π / 6) (CM), let x = 0 get the minimum value of t as 5 / 3S