Trigonometry - Simple Identities (AQA A-Level Mathematics): Quizzes

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

$1 + \tan^2 \theta = \sec^2 \theta$

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

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

$\cos \theta$

$\cos(-\theta) = \cos \theta$

$2 \sin \theta \cos \theta$

Identical to (true for all values)

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

$-\frac{\sqrt{3}}{2}$