When trying to come up with the geodesic equation for a sphere I came across this equation. My question, is this equation just a short cut so we dont have to integrate and differentiate with two variables.(adsbygoogle = window.adsbygoogle || []).push({});

Here is the equation

https://lh5.googleusercontent.com/proxy/Anoym1_CMRu6UeyS26mZmQ6lUIyHNg6uGfJMEY7usCCTrg_NtRCSl2teErq6b-uRGuiqYOWYQD0pMi2GLwYg2HP9fvx3mqPbwLlPonE6blR6Rn2EUaEv5M2u2IR2SjbGCJDinw=w136-h47-nc

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# The point of the Euler-Lagrange equation?

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