Trigonometric Equations (Grade 11 NSC Matric Mathematics): Quizzes

Between $0°$ and $90°$

Quadrants I and III

$180°$

$\theta = 180° + \text{ref angle}$

Functions are periodic

Quadrants I and II

$k \times 360°$

Factoring or substitution

Divide $360°$ by $2$

$\theta = 360° - \text{ref angle}$