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Im a bit stuck at part (e) and (f)
The 4 basic solutions are:
sinkx*coskct
sinkx*sinkct
coskx*coskct
coskx*sinkct
I got the 4 boundary conditions as:
y(0,t)=0
y(L,t)=0
y(x,0)=sin (2pi/l)x
dy/dt at t=0, =0
For part (e), I could eliminate coskx*coskct and coskx*sinkct from y(0,t)=0.
How do I choose between the other 2 solutions?
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for part (f)
How do I do it? Thanks.