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If trolley accelerates horizontally with...

If trolley accelerates horizontally with acceleration a then bob is displaced backward from its initial vertical position. The angular deflection of the bob in equilibrium is

A

`theta=cos^(-1)((a)/(g))`

B

`theta=sin^(-1)((a)/(g))`

C

`theta=cot^(-1)((a)/(g))`

D

`theta=tan^(-1)((a)/(g))`

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