4400 Higher November 2009 Paper 3 Q12
12
(a) 
Give your answer correct to 3 significant figures. (3)
Diagram NOT accurately drawn
Calculate the value of \(x\).Give your answer correct to 3 significant figures. (3)
(b) 
Give your answer correct to 3 significant figures. (3)
Diagram NOT accurately drawn
Calculate the value of \(y\).Give your answer correct to 3 significant figures. (3)
| Scheme | Marks |
|---|---|
| \(4^2 + 6^2\) (= 52) | M1 |
| \(\sqrt{\text{“}52\text{”}}\) | M1 (dep) |
| 7.21 | A1 |
| (3) |
Notes
A1: 7.21(11...) awrt 7.21
| Scheme | Marks |
|---|---|
| \(\cos 20 = 5/y\) | M1 |
| \(y = 5/\cos 20\) | M1 |
| 5.32 | A1 |
| (3) | |
| (6 marks) |
Notes
M1: cos selected
A1: 5.32088...... awrt 5.32
Alternative
\(y/\sin 90 = 5/\sin 70\) M1
\(y = 5/\sin 70\) M1