Laplacian of Scalar Function

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My question entails the laplacian of a scalar function and I would like to express it in polar coordinates.

Stuck on whether I am supposed to use one of the forms of Laplace's equation to help me solve or do something else.

Any advice/guidance/help would be warmly appreciated.

-nomad609

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Well there are harder stuff than this.

Anyway, you have $\nabla^2 f = \nabla \cdot \nabla f = 1/r\partial_r (r\partial_r f)+1/r \partial_\theta (1/r \partial_\theta f)$.

Straightforward, plug the second identity to the first.