AS June 2018 Paper 1 Q4
4 Sketch the graph given by the polar equation
\[r = \frac{a}{\cos\theta}\]where \(a\) is a positive constant. [2 marks]
| Scheme | Marks | AO |
|---|---|---|
| Draws correct line. Condone a half-line. | M1 | 1.1a |
| Draws the full correct line and gives the correct intersection point on the initial line. Condone the angle omitted. | A1 | 1.1b |
| (2 marks) |
Typical solution
