I had a
Since y(0) = y(2pi) then c
1 e
0 + c
2 e
-0 + sin(0) = c
1 e
2pi + c
2 e
-2pi + sin(2pi)
c
1 + c
2 = c
1 e
2pi + c
2 e
-2pi
Don't know what to do with one equations and two unknowns.
The solution I'm looking for is a function of x, so one equations and 2 unknowns is okay, but I lost my x.