4400 Higher November 2008 Paper 3 Q9
9
Diagram NOT accurately drawn
Work out the value of \(x\).
Give your answer correct to 1 decimal place.
(3)
| Scheme | Marks |
|---|---|
| \(\cos x^\circ = \dfrac{5.4}{8.7}\) or 0.6206... | M1 A1 |
| 51.6 | A1 |
| (3) | |
| (3 marks) |
Notes
M1 A1: M1 for cos
A1 for \(\dfrac{5.4}{8.7}\) or 0.6206...
or M1 for sin and \(\dfrac{\sqrt{\text{“}46.53\text{”}}}{8.7}\) following correct Pythagoras and A1 for value which rounds to 0.78
or M1 for tan and \(\dfrac{\sqrt{\text{“}46.53\text{”}}}{5.4}\) following correct Pythagoras and A1 for value which rounds to 1.26
A1: for answer rounding to 51.6