If the boundary conditions are not derivative then it is a sine fourier series

and if they are derivative it is a cosine fourier series

Is this correct?

Also how do you know which case to use when lambda is less than, equal to or more than?

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- Dec 31st 2010, 08:22 AMadam_leedsHeat equation
If the boundary conditions are not derivative then it is a sine fourier series

and if they are derivative it is a cosine fourier series

Is this correct?

Also how do you know which case to use when lambda is less than, equal to or more than? - Dec 31st 2010, 08:49 AMJester
It is also possible to have both i.e. one boundary is fixed while the other is insulated.