Trigonometric Equations (AQA A-Level Mathematics): Flashcards

$\sin^2 \theta + \cos^2 \theta = 1$

$\sec^2 \theta$

$\csc^2 \theta$

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

$\frac{1}{\cos \theta}$

$\frac{1}{\sin \theta}$

$2 \sin \theta \cos \theta$

$\cos \theta$ (even function)

$-\sin \theta$ (odd function)

Identical to (stronger than =, true for all values)