Initial displacement of a midpoint of a string?

[Howard Fox]

Homework Statement

Then we are asked to determine the initial discplament, velocity and acceleration of the midpoint of the string.

Homework Equations

I guess we should use equation x(t)=Asin(wt+phi)

The Attempt at a Solution

My attempted solution is to use the above equationa and put t=0. That would give us an initial displacement of 1.60x10^-3 m, and for the velocity and acceleration differentiate the initial equation and again put t=0.
Is that a good solution? Thank you

 

[.Scott]

That is perfect.