Heat Conduction in a rectangle with an Initial Profile

Example 7.4. Heat Conduction in a rectangle with an Initial Profile 

Example 7.1 is solved again with a sinusoidal profile in x as the initial condition.[l] The dimensionless temperature profile is governed by  

numeric exception division by zero The limit command is applied to n = 1  

There is only one nonzero term in the infinite series  

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