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Please use your own answer and solution, do not copy from other website or I will have to report. Write neatly, thank you! Solve the

Please use your own answer and solution, do not copy from other website or I will have to report. Write neatly, thank you!

Solve the following differential equations: a) ydr " - (tan-1 x) dy = : ydx x2+1 - (In x ) dy. b) (x2 + 1) dy + 3x(y - 1) = 0, y(0) = 2. c) Find the orthogonal trajectories of the family of curves y = k(secx + tanx)

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