4MA0 Higher January 2013 Paper 3 Q16
16
Diagram NOT accurately drawn
Calculate the value of \(x\).
Give your answer correct to 1 decimal place.
(3)
| Scheme | Marks |
|---|---|
| \(7^2 = 9^2 + 13^2 - 2 \times 9 \times 13 \cos x\) oe | M1 |
| \(234 \cos x = 201\) | M1 |
| 30.8 | A1 |
| (3) |
Notes
M1: or \(\cos x = 0.86\) or better
A1: 30.798… awrt 30.8