help on laplace transforms

mrmotobiker

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

y''+4y=sin(t)+u (sub pi) * sin(t-pi)
y(0)=0 y'(0)=0

2. Relevant equations



3. The attempt at a solution

see attached

sorry, it took forever to put that into equation editor and i didn't want to do it again

i'm stuck on where to go now. am i doing this correctly so far? please help! thanks

Attached Thumbnails