In this video we will talk about orthogonal trajectories. What are orthogonal trajectories? How to find orthogonal trajectories? All these questions will be answered here. We wil see how first order differential equations will help us to arrive at this. For reference you can refer book by Erwin Kreyszig section 1.6 Links for previous videos: What are differential equations, order, degree and soution of an ordinary differential equations: https://www.youtube.com/watch?v=deVxLwZhvRA ================================================================ Variable separable method: https://www.youtube.com/watch?v=zZhd7f8pvN8 ================================================================ Reduction to variable separable method: https://www.youtube.com/watch?v=o21CIMUJFio ================================================================ Exactness method: https://www.youtube.com/watch?v=EJAMToBj3yA ========================================== Integrating factor: https://www.youtube.com/watch?v=t5U7mlIzQK8 ======================================== Linear Differential equations: https://www.youtube.com/watch?v=7TQywUg_R1o ========================================= Bernoulli differential equation: https://www.youtube.com/watch?v=BZGI6h4N3hw