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In: Advanced Math

a. tan ^ -1(y/x) Show that the function u(x,y)define classical solution to the 2-dimentional Laplace equation...

a. tan ^ -1(y/x) Show that the function u(x,y)define classical solution to the 2-dimentional Laplace equation Uxx+Uyy =0

b. e ^ -(x-2t)^2 Show that the function u(t,x) is a  solution to wave equation

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