Correct Answer - C
From free body diagrams
`N sin alpha =Ma----(1)`
`N + mA sin alpha = mg cos alpha ----(2)`
`mg sin alpha + mA cos alpha =ma----(3)`
on solving (1) (2) (3)
`A=(mg cos alphasinalpha)/(M+msin^(2)alpha),a=((M+m)gsinalpha)/(M+msin^(2)alpha)`
Now `overset(rarr)(block)=overset(rarr)(block//"wedge")+overset(rarr)(a_(wegde)`
`:.vecablock=(acosalphahati-asinalpha)hatj-Ahati`
`(acosalpha-A)hati-asinalphahatj`
`:.tanbeta=(asinalpha)/(acosalpha-A)=(1+(m)/(A))tanalpha`
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