The equation for the displacement (x) of a particle executing simple harmonic motion is $x=18\sin\left(2\pi t+\frac{\pi}{2}\right)$ cm, where 't' is time in second. The minimum time after $t=0$ when the velocity of the particle becomes maximum is
Show Hint
In SHM, maximum speed occurs at the mean position \((x=0)\), while velocity becomes zero at extreme positions.