A spherical balloon of radius r subtends an angle 'theta' at an observer's eye. The angle of elevation of centre of the balloon is `phi`. Prove that the height of the centre of the ball is `rsinphi cosec""theta/2`.

A round balloon of radius r subtends an angle at the eye of the observer while the angle of elevation of its centre is beta. Prove that the height of the centre of the balloon is r sin beta csc(alpha)/(2)

A round balloon of radius r subtends an angle alpha at the eye of the observer while the angle of elevation of its centre is beta. Prove that the height of the centre of the balloon is r sin(beta)cos ec(alpha)/(2)

A round balloon of radius r subtends an angle alpha at the eye of the observer while the angle of elevation of its centre is beta Prove that the height of the centre of the balloon is r sin beta cos ec[(alpha)/(2)]

A round balloon of radius 'r' subtends an angle alpha at the eye of the observer, while the angle of elevation of its centre is beta . Find the height of the centre of balloon.

A round balloon of radius R subtend an angle 2alpha at the eye of the observer, while the angle of elevation of it's centre is 2beta , then the height of the centre of balloon is

A spherical ballon of radius r subtends angle 60^(@) at the eye of an observer. If the angle of elevation of its centre is 60^(@) and h is the height of the centre of the ballon, then which one of the following is correct ?

A spherical ball of diameter d subtends an angle alpha at a man's eye when the elevation of its centre is beta ,then the height of the centre of the ball is (1)/(2)d sin beta cos ec((alpha)/(2))