i have to use variation of parameters method for this ode
<br />
\frac{d^2y}{dt^2} + w^2y = Eo sin(wt)<br />
where Eo and w are constants

i have found the complementary function
<br />
Aexp(wit) + Bexp(-wit) or Ccos(wt) + Dsin(wt)<br />

what are my y1 and y2 values?