Foundation January 2022 Paper 1 Q18
18 The diagram shows triangle \(ABC\)
Diagram NOT accurately drawn
Work out the length of the side \(AB\)
Give your answer correct to 3 significant figures.
(3)
| Scheme | Marks |
|---|---|
| eg \(\sin 65 = \dfrac{AB}{8.4}\) or \(\dfrac{AB}{\sin 65} = \dfrac{8.4}{\sin 90}\) | M1 |
| eg (\(AB\) =) \(8.4 \sin 65\) or (\(AB\) =) \(\dfrac{8.4 \sin 65}{\sin 90}\) | M1 |
| 7.61 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: for setting up a trig equation in \(AB\)
M1: for a complete method
A1: accept 7.61 – 7.613