Solving Trigonometric Equations (Grade 10 NSC Matric Mathematics): Quizzes

$\sin \theta = \frac{\text{opposite}}{\text{hypotenuse}}$

$\cos = \frac{\text{adjacent}}{\text{hypotenuse}}$

$\tan^{-1}\left(\frac{\text{opposite}}{\text{adjacent}}\right)$

When finding angles from known ratios

SHIFT (or 2nd) key

1

Hypotenuse

2.14 > 1 and max value of cosine is 1

1 decimal place

$\sin \theta = \frac{\text{opposite}}{10}$