# Maths - Small Angle Approximations

> Source: https://ollybritton.com/notes/a-level/maths/topics/small-angle-approximations/ · Updated: 2021-11-09 · Tags: school, maths, year-2, trigonometry

## See Also
- [Further Maths - Radians](https://ollybritton.com/notes/a-level/further-maths/topics/radians/)

## Flashcards
##### What is the small angle approximation for $\sin \theta$ and $\tan \theta$??
$$
\sin \theta \approx \tan \theta \approx \theta
$$

##### What is the small angle approximation for $\cos \theta$??
$$
1 - \frac{\theta^2}{2}
$$

##### What is $$\frac{\tan 2\theta}{\sin \theta}$$ for $\theta \approx 0$??
$$
2
$$

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