A mass attached to a spring will hang at an equilibrium point.
If it is then pulled away and either given a shove or simply let go,
its distance from equilibrium will oscillate evenly above and below

If y is displacement from equilibrium t seconds after release
y = 0.12 cos 20πt + 0.09 sin 20πt
a) Choose a viewing range to display at least two full periods
of the oscillation for positive values of t. How did you choose?
b) Find the coordinates of the first maximum point for positive t.
c) Find the amplitude and phase shift of the oscillation
d) Express the distance of the mass

Question

A mass attached to a spring will hang at an equilibrium point.
If it is then pulled away and either given a shove or simply let go,
its distance from equilibrium will oscillate evenly above and below

If y is displacement from equilibrium t seconds after release
y = 0.12 cos 20πt + 0.09 sin 20πt
a) Choose a viewing range to display at least two full periods
of the oscillation for positive values of t. How did you choose?
b) Find the coordinates of the first maximum point for positive t.
c) Find the amplitude and phase shift of the oscillation
d) Express the distance of the mass