June 2023 Paper 1 Q4

4 Given that \(\theta\) is a small angle, find an approximation for \(\cos 2\theta\)

Circle your answer. [1 mark]

• \(1 - \dfrac{\theta^2}{2}\)
• \(2 - 2\theta^2\)
• \(1 - 2\theta^2\)
• \(1 - \theta^2\)