ANGLE OF ELEVATION

The angle of elevation of the top of a tower from a point on the same level as the foot of tower is phi . On moving 'a' mctrcs towards the foot of tower, the angle of elevation becomes 45^(@) and again on moving b metres in the same dorection, the angle of elevation becomes (90^(@)-phi) . Find the height of the tower.

Apoorv is standing in the centre of a rectangular park and observes that the angle of elevation of the top of a lamp post at a corner of the park in 60^(@) . He then moves diagonally towards the opposite corner of the park and observes that the angle of elevation is now beta , then the value of beta is

A person standing on the bank of a river observes that the angle of elevation of top of a tree on the opposite bank of the river is 60^@ and when the retires 40 metres away from the tree the angle of elevation becomes 30^@ the breadth of the river is

A person observed the angle of elevation of the top of a tower as 30^@ . He walked 50m towards the foot of the tower along level ground and found the angle of elevation of the top of the tower as 60^@ . Find the height of the tower.

A person observed the angle of elevation of the top of a tower as 30^@ . He walked 50m towards the foot of the tower along level ground and found the angle of elevation of the top of the tower as 60^@ . Find the height of the tower.

At a point on level ground, the angle of elevation of a vertical tower is found to be such that its tangent is 5//12 . On walking 192 metres towards the tower, the tangent of the angle of elevation is 3//4 . Find the height of the tower.

Which are the angles of elevation?