| Exam Board | OCR MEI |
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| Module | AS Paper 1 (AS Paper 1) |
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| Year | 2024 |
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| Session | June |
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| Topic | Sine and Cosine Rules |
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1 The triangle ABC has an obtuse angle at A . The angle at B is \(15 ^ { \circ }\). The length of AC is 10 cm and the length of BC is 13 cm .
Calculate the size of the angle at A .