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I'm trying to get the [itex]Y_l^l [/itex] spherical harmonic and I'm running into problems evaluating the following expression:

[tex]

\frac{d^{2l}(\cos^2(\theta) - 1)^l}{d\cos(\theta)^{2l}}

[/tex]

The 2lth derivative with respect to cos theta of cos squared theta - 1 to the lth power

it just seems like i'm going to end up with more and more terms as I keep differentiating..

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# Homework Help: Spherical Harmonics

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