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**UNIT 1**

Unit 1: Exact differential equations, Reducible to exact Part 1, Reducible to exact Part 2, Linear & Bernoulli Equations, Linear differential equations of higher order with constant coefficients, Linear differential equations of higher order with constant coefficients - Part 1, Non homogeneous terms with RHS term of the type ax e , sin ax, cos ax 01, Non homogeneous terms with RHS term of the type ax e , sin ax, cos ax,02, Higher order differentional equations Problem 1, Higher order differentional equations Problem 2, Higher order differentional equations Problem 3, Higher order differentional equations Problem 4, Higher order differentional equations Problem 5, Higher order differentional equations Problem 6, Higher order differentional equations Problem 7, Higher order differentional equations Problem 8, Higher order differentional equations Problem 9, Higher order differentional equations Problem 10, Applications : Newton?s law of cooling and natural growth and decay, Problems on Newton?s law of cooling, Problems on natural growth and decay, Orthogonal trajectories, Problems on Orthogonal Trajectories Part 1, Problems on Orthogonal Trajectories Part 2, Problems on EDE, EDE Polar Form, Electrical Circuits Applications