A particle of mass ( m ) is projected at a velocity ( u ), making...

A particle of mass ($\mathrm{m}$) is projected at a velocity ($\mathrm{u}$), making an angle ($\theta$) with the horizontal ( ($\mathrm{x}$)-axis). If the angle of projection ($\theta$) is varied keeping all other parameters same, then magnitude of angular momentum (L) at its maximum height about the point of projection varies with ($\theta$) as,