11. * 1 point which of the following is an example for first order linear partial differential equation? a)lagrange's partial differential equation (6) clairaut

11. * 1 point Which of the following is an example for first order linear partial differential equation? a)Lagrange's Partial Differential Equation (6) Clairaut s Partial Dififerential Equation () One-dimensional Wave Equation (d) One-dimensional Heat Equation O a O b O O d 24. 1 point Ifx= rcos6, y = rsin then the value of is a(r8) (a) 1 b)0 (c)r () O a O b O Od