| Exam Board | Edexcel |
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| Module | C3 (Core Mathematics 3) |
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| Year | 2009 |
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| Session | June |
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| Topic | Addition & Double Angle Formulae |
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8. (a) Write down \(\sin 2 x\) in terms of \(\sin x\) and \(\cos x\).
(b) Find, for \(0 < x < \pi\), all the solutions of the equation
$$\operatorname { cosec } x - 8 \cos x = 0$$
giving your answers to 2 decimal places.