Wiktionary
rederive
vb. (context mathematics physics English) To derive again, especially by using a different method
Usage examples of "rederive".
Bose had found an ingenious way to rederive the law of radiation that Max Planck had originally worked out in 1900, the theoretical breakthrough that had started the quantum revolution.
Bennett stares out the window, at the streetlights below, and realizes that he will have to rederive the equations.