deadenders7434 deadenders7434 13-01-2020 Mathematics contestada Show that (cos ax)(cos bx)(cos cz) is an eigenfunction of the Laplacian operator ∇²= ζ²/ζx² + ζ²/ζy²+ ζ²/ζz². An eigenfunction Ψa= aΨa, where a is a scalar called the 'eigenvalue'. What is the eigen value for this problem?
