1. The problem statement, all variables and given/known data A supply plane is flying at 60.0m/s at an altitude of 200.0m. What angle of flight will yield the maximum horizontal range for the dropped package? 2. Relevant equations 1/2(g)(t)2. 3. The attempt at a solution So far the only equations that i have, but may be wrong, is x=((60m/s)cos([itex]\Theta[/itex]))t+1/2(g)(t)2. and y=((60m/s)sin([itex]\Theta[/itex]))t+1/2(g)(t)2+200m. I'm told it would involve a quadratic formula if i do it the more efficient way, but i cannot figure out how to complete it, or if i am going about it all wrong to find the angle that gives the farthest distance. I have also tried messing around with the formulas to try to combine them. I've also thought of using excel to test every angle from 0.0-90.0° but i haven't worked out how i would do that either.