# Equation of Motion

1. Feb 5, 2008

### krnhseya

1. The problem statement, all variables and given/known data

A sin (wt + $$\Phi$$) = 0
Find A and $$\Phi$$

2. Relevant equations

Asin(wt)cos$$\Phi$$ + Acos(wt)sin$$\Phi$$ = 0

3. The attempt at a solution

I was told to use magnitude to figure out A and something else to find $$\Phi$$ in variable.
I absolutely have no idea what to do...
I found a part of solution, which got me w and I am expected to solve for A and $$\Phi$$ with that given equation.

I tried to use original equation by plugging in t = 0 for A sin (wt + $$\Phi$$) and first and second derivative from original equation.

I think once I get those A and $$\Phi$$, I "might" be able to solve entire problem.

Thank you.

2. Feb 5, 2008

### krnhseya

is there missing info or ?