4400 Higher November 2007 Paper 3 Q12
12
Diagram NOT accurately drawn
(i) Calculate the length of \(BC\). (2)
(ii) Calculate the length of \(CD\).
Give your answer correct to 3 significant figures. (3)
Give your answer correct to 3 significant figures. (3)
| Scheme | Marks |
|---|---|
| \(BC/8 = \cos 25\) or \(= 8\cos 25\) | M1 |
| 7.25(046..) | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| \(7.5^2 - \text{“}7.25046...\text{”}^2\) | M1 |
| \(\sqrt{7.5^2 - \text{“}7.25046..\text{”}^2}\) | M1 |
| 1.92... | A1ft |
| (3) | |
| (5 marks) |
Notes
M1: dep
A1ft: ft (a)