A projectile is launched at an angle ‘\( \alpha \)’ with the horizontal with a velocity \( 20 \, \text{m s}^{-1} \). After \( 10 \, \text{s} \), its inclination with horizontal is ‘\( \beta \)’. The value of \( \tan \beta \) will be: \( ( \, g = 10 \, \text{m /s}^{2} \, ) \)
