Specimen 2020 Paper 1 Q12
12 \(AB = 4\) cm \(\qquad AC = 7\) cm \(\qquad \cos x = -\dfrac{2}{7}\)
Work out the length of \(BC\). [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(4^2 + 7^2 - 2 \times 4 \times 7 \times \left(-\dfrac{2}{7}\right)\) | M1 | oe |
| 81 | A1 | |
| 9 | A1 |
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Specimen 2020 Paper 1 Q12