| Exam Board | OCR |
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| Module | Further Pure Core 2 (Further Pure Core 2) |
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| Session | Specimen |
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| Topic | Hyperbolic functions |
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8 The equation of a curve is \(y = \cosh ^ { 2 } x - 3 \sinh x\). Show that \(\left( \ln \left( \frac { 3 + \sqrt { 13 } } { 2 } \right) , - \frac { 5 } { 4 } \right)\) is the only stationary point on the curve.