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# Solving Laplace's Equation With Boundary Conditions watch

1. In the attachment, problem 49.

"The boundary conditions now force A = 0, = n (positive integer) and C = 0."

i don't see how this works can somebody explain. when i apply

u(x,0)=0 i get
does this force C=0? (i.e. if we assume we wan't non trivial A and B, can we just conclude C=0)

in particular i can't see why lambda must be an integer
Attached Images
2. s39-57.pdf (191.8 KB, 3179 views)
3. anybody lol?
4. X(0)=0 gives A=0. X(pi)=0 implies so lambda is an integer. Y(0)=0 implies C=0.

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