The midpoint M of a guitar string is pulled a distance d $=1\mathrm{.}7$ mm from equilibrium and released. Point M is observed to undergo simple harmonic motion with a frequency f $=110$ Hz$.$

$-$ Part $($a$)$

Calculate the angular frequency of oscillation in radians per second.

$=691\mathrm{.}15$

$=691\mathrm{.}2691\mathrm{.}2$Correct$!$

$$ Part $($b$)$

Assume the displacement of point M from equilibrium as a function of time t after release is of the form x$($t$)=$ xmax cos$($t $+).$ What is xmax in meters?