Strategy for Trigonometric Equations (AQA A-Level Mathematics): Flashcards

$\sin\theta = \frac{1}{2}$

$2\sin^2\theta - \sin\theta - 1 = 0$

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

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

$\sin(2\theta) = 2\sin\theta\cos\theta$

$\theta = \theta_0 + 360°n$ (also check $180° - \theta_0$)

$\theta = \theta_0 + 180°n$ (or $\theta_0 + \pi n$)

$0°$ to $360°$ or $0$ to $2\pi$ radians

Angle more complicated than just $\theta$

Modify domain to find limits for compound angle