# The time of flight (t) of a projectile on an upward inclined plane is (where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

t = g cos β/2u sin (α - β)

t = 2u sin (α - β)/g cos β

t = g cos β/2u sin (α + β)

t = 2u sin (α + β)/g cos β

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