A cannon ball is fired from an angle o with an intial velocity of v. The hill sklopes down with an angle of O. Prove that the horizontal distance the cannon ball travels is given by dx= 2v2cos(o)sin(O+o)/gcos(O) 2. Equations sin(O+o)=sin(O)cos(o)+sin(o)cos(O) d=1/2gt2 3. The attempt at a solution Please help me!!! Hopefully the picture helps!