# Edexcel A Level

## Small Angle Approximations

##### Small Angle Approximations with Radians
For small θ, measured in radians:
 $\large { \color{blue}{ \sin \theta } \approx \color{green}{ \theta } }$ $\Large { \color{blue}{ \cos \theta } \approx \color{green}{ 1 - { { { \theta ^ 2 } } \over 2 } } }$ $\large { \color{blue}{ \tan \theta } \approx \color{green}{ \theta } }$

This display allows you to zoom in on these approximations.