A round balloon of radius r subtends an angle alpha at the eye of observer | Class 10 | Rd sharma

Опубликовано: 13 Июль 2026
на канале: MATHS ADDA
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A round balloon of radius r subtends an angle alpha at the eye of observer while the angle of elevation of its centre is beta prove that the height of the centre of balloon is r sin beta cosec alpha/2.
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