A round balloon of radius r subtends an angle α at the eye of the observer while the angle of elevation of its centre is β. Prove that the height of the centre of the balloon from the ground is(r sin β cosecα2)

A round balloon of radius r subtends an angle α at the eye of the obs

1.	A round balloon of radius r subtends an angle α at the eye of the observer while the angle of elevation of its centre is β. Prove that the height of the centre of the balloon from the ground is(r sin β cosecα2)
Answer» A round balloon of radius r subtends an angle $α$ at the eye of the observer while the angle of elevation of its centre is $β$ . Prove that the height of the centre of the balloon from the ground is $(r s i n β c o s e c \frac{α}{2})$

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A round balloon of radius r subtends an angle α at the eye of the observer while the angle of elevation of its centre is β. Prove that the height of the centre of the balloon from the ground is(r sin β cosecα2)

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