1. The problem statement, all variables and given/known data Today my teacher asked me "What are the best 2 angles to use when wanting to get maximum horizontal distance while on an elevated surface of 50m." As in Dx. What would these 2 angles have to be for the projectile to go the furthest distance horizontally and what would the angles have to be for the projectile to have the highest vertical height. How could I figure out what the 2 angles are? Is there a certain formula you would use and just plug it in? What would X and Y have to be. http://i.imgur.com/YLEHRzT.png?1 2. Relevant equations No clue since this wasn't homework and my teacher just asked me if i could try and figure out how to solve it. dR/d∅ = V2/g [cos∅ (cos∅ + (sin∅ * cos∅) / √sin∅2 + C ) - sin∅(sin∅ + √sin∅ + C)) 3. The attempt at a solution I tried finding different equations, but this is the only one I could find and it didn't work. I know one angle can't be above 45 since both angles have to total to 90.