Notes: https://itiscivilengineering.com/char...
Differentiation of tan^-1(y/x) 👇🏻
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Examples in this video:
Solve:
1) px + qy = pq
2) (x² - y²)pq - xy(p² - q²) -1 = 0
#nonlinear #partial_differentiation #engineeringmathematics