I am working on the derivation of the angular momentum squared operator (in quantum mech.) and there is one step that I dont see how it works. I'm not sure that this is the right place to post it, but since this is a strictly mathematical question, I figured I would post it here. The equivalence is as follows:(adsbygoogle = window.adsbygoogle || []).push({});

(cotθ)(∂/∂θ) + (∂/∂θ)^{2}= (cscθ)(∂/∂θ)[(sinθ)(∂/∂θ)]

I dont see how to go from one to the other

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# Trying to see how these are equivalent

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