Angles of Elevation and Depression (HSC SSCE Mathematics Standard): Flashcards

Angle measured upward from a horizontal line

Angle measured downward from a horizontal line

Horizontal line (not vertical)

They are equal to each other

Form alternate angles between parallel horizontal lines

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

When you have opposite and adjacent sides

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

When you have opposite side and hypotenuse

Draw a clear diagram showing horizontal line and angle