Some Applications of Trigonometry

The line drawn from the eye of an observer to the point
in the object viewed by the observer is known as

When a point is observed, the angle formed by the line of sight with the horizontal where the point being viewed is above the horizontal level is known as

When a point is observed, the angle formed by the line
of sight with the horizontal when the point being viewed
is below the horizontal level is known as

When we raise our head to look at the object, the angle
formed by the line of sight with the horizontal is known
as

When we lower our head to look at the object, the angle
formed by the line of sight with the horizontal is known as

When the length of the shadow of a pole is equal to a height of the pole, then the elevation of source of light is