Defining the Trigonometric Ratios (Grade 10 NSC Matric Mathematics): Quizzes

Angles and sides

The hypotenuse

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

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

$\tan \theta = \frac{\text{opposite}}{\text{adjacent}}$

Cosine = Adjacent/Hypotenuse

Sine and cosine

Only with right-angled triangles

$\frac{4}{3}$

The hypotenuse