| Exam Board | CAIE |
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| Module | P3 (Pure Mathematics 3) |
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| Year | 2016 |
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| Session | November |
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| Topic | Product & Quotient Rules |
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2 The equation of a curve is \(y = \frac { \sin x } { 1 + \cos x }\), for \(- \pi < x < \pi\). Show that the gradient of the curve is positive for all \(x\) in the given interval.