What will be the angle of reflection in case of an inelastic collision and `v=`?

Explanation

`v_(1)=eu_(1)` (`CN` by definiton of `e` )
`v_(||)=u_(||)` (CT)
`:. vcosr=eucosi `
`vsinr=usini`

Squaring and adding we get
`v=usqrt(sin^(2)i+e^(2)cos^(2)i)`
dividing we get `tanr=(tani)/e`
`implies r=tan^-1((tani)/e)`