Find the equation of the curve passing through the point 0, 4
π
⎛
⎞
⎜
⎟
⎝
⎠  whose differential
equation is sin x cos y dx + cos x sin y dy = 0 9 Find the particular solution of the differential equation
(1 + e2x) dy + (1 + y2) ex dx = 0, given that y = 1 when x = 0 10