Some Applications of Trigonometry

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

The angle of elevation of the top of a tower from a point 20 metres away from its base is 45

The angle of elevation of the sun, if the length of the
shadow of a tower is V3 times the height of the tower is