Some Applications of Trigonometry Mind Map

The angle of elevation is the angle made by the line of sight with the horizontal when an object is seen above eye level.

Always draw the horizontal line at the observer's eye level first. Then mark the upward angle carefully.

The angle of depression is the angle made by the line of sight with the horizontal when an object is seen below eye level.

First draw the horizontal at the observer's eye level. For depression, the line of sight goes downward below that line.

The line of sight is the straight line joining the observer's eye to the object being seen.

Mark the line of sight first in every sketch. It helps you find the angle and the right triangle quickly.