1.

A spherical balloon subtends an angle 2 alpha at a man's eye and the elevation of its centre is beta. If theta is the elevation of the hightest point of the balloon at A then tan theta is equal to

Answer»

`(SIN alpha + COS BETA)/(sin beta)`
`(sin alpha + sin beta)/(cos beta)`
`(sin alpha + cos beta)/(sin alpha)`
`(sin alpha + sin beta)/(cos alpha)`

ANSWER :B


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