Initial Conditions are:

So, My roots are

Its in the form P+- qi

Does the fact that my P=0 change anything? Or should I just roll with it?

Anyways, heres what I did

So, when Y(0)=-1

We get

When

we get:

which is just a false statement.

Im not able to isolate "B" given the initial conditions. What am I doing wrong?