Finding Parameters for Simple Harmonic Motion at t=1

[Jaimee]

Homework Statement

1. Consider a Simple Harmonic Motion
   (SHM) for which, at time t = 1 s, the displacement is s=1 cm, the velocity is
   2 cm s−1, and the acceleration is −3
   cm s−2. Find the angular frequency, 4. amplitude, and phase constant for this motion.

Homework Equations

f=1/T
T=2pi*sqrt(m/k)=(2*pi)/w
w=v/R
v=-Awsin(wt)
s(t)=A*cos((2pi*t)/T)

The Attempt at a Solution

I have atached my attempt as a picture but I don't really know how to start

 

[haruspex]

You are not asked or told about period, so don't bother with equations involving that.
Start with a generic form of equation, s=Acos(ωt+φ). You need the φ because phase is mentioned.
In terms of A, ω and φ, what are:
- the displacement when t=1,
- the velocity when t=1
- the acceleration when t=1?