Solution of trigonometric equations (AQA GCSE Further Maths): Flashcards

$\tan \theta = \frac{\sin \theta}{\cos \theta}$

At $90°$, $270°$ (where $\cos \theta = 0$)

Lines the function approaches but never reaches

$180°$

$360°$

The first solution your calculator gives

Between $-90°$ and $90°$

Between $0°$ and $180°$

Between $-90°$ and $90°$

$180° - \theta$

$360° - \theta$

$\theta + 180°$

Degrees mode (look for 'D' or 'DEG')