| Exam Board | OCR MEI |
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| Module | Paper 2 (Paper 2) |
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| Year | 2018 |
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| Session | June |
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| Topic | Harmonic Form |
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6
- Express \(7 \cos x - 24 \sin x\) in the form \(R \cos ( x + \alpha )\), where \(0 < \alpha < \frac { \pi } { 2 }\).
- Write down the range of the function
$$f ( x ) = 12 + 7 \cos x - 24 \sin x , \quad 0 \leqslant x \leqslant 2 \pi .$$