The range on the horizontal plane is 2A, or V20sin22αg The greatest range on the horizontal plane is obtained when sin2α = 1, or α = 45 o . The great...The range on the horizontal plane is 2A, or V20sin22αg The greatest range on the horizontal plane is obtained when sin2α = 1, or α = 45 o . The greatest range on the horizontal plane is therefore V20g The maximum height reached is B, or V20sin2α2g The distance between vertex and focus is a, or V20cos2α2g.The focus is above ground if this is less than the maximum heigh…