| Exam Board | AQA |
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| Module | FP3 (Further Pure Mathematics 3) |
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| Year | 2007 |
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| Session | June |
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| Topic | First order differential equations (integrating factor) |
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3 By using an integrating factor, find the solution of the differential equation
$$\frac { \mathrm { d } y } { \mathrm {~d} x } + ( \tan x ) y = \sec x$$
given that \(y = 3\) when \(x = 0\).