Trigonometry Exact Values (Edexcel A-Level Mathematics): Flashcards

Precise values of trig functions for specific angles.

$\sin 30° = \frac{1}{2}$.

$\cos 45° = \frac{\sqrt{2}}{2}$.

$\tan 60° = \sqrt{3}$.

$\csc 30° = 2$ or $1/\sin 30° = 2$.

$\sec 60° = 2$, since $\sec x = \frac{1}{\cos x}$ and $\cos 60° = 0.5$.

$\sin 30° = 1/2$, $\sin 60° = \sqrt{3}/2$.

$\cos 0° = 1$.

$\cos 90° = 0$, $\sin 90° = 1$.

They simplify calculations and prove identities efficiently.