| Exam Board | SPS |
|---|
| Module | SPS FM (SPS FM) |
|---|
| Year | 2020 |
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| Session | May |
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| Marks | 3 |
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| Topic | Hyperbolic functions |
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3.
Show that
$$\cosh ^ { 3 } x + \sinh ^ { 3 } x = \frac { 1 } { 4 } \mathrm { e } ^ { m x } + \frac { 3 } { 4 } \mathrm { e } ^ { n x }$$
where \(m\) and \(n\) are integers.
[0pt]
[3 marks]