Polytechnic TRB Maths | Integral Surface | PDE

Polytechnic TRB #3 Integral surfaces Passing through a given curve was discuused Polytechnic TRB #1 (classification of Regular irregular Singular Points) https://youtu.be/m4xx0UFRw5g Polytechnic TRB #2 ( Inverse of Cosine function) https://youtu.be/NaVBCsjqwIA