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A partical moves from rest at A on the s...

A partical moves from rest at A on the surface of a smooth circule cylinder of radius `r` as shown . At `B` it leavels the cylinder. The equation releaseder . The equation relating `alpha and beta` is

A

`3sinalpha=2cosbeta`

B

`2sinalpha=3cosbeta`

C

`3sinbeta=2cosalpha`

D

`2sinbeta=3cosalpha`

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