1. The problem statement, all variables and given/known data A cannon with muzzle speed of 1000 m/s is used to start an avalanche on a mountain slope. The target 2000m from the cannon horizontally and 800m above the cannon. At what angle should the cannon be fired? 2. Relevant equations A buttload of the projectile motion ones. 3. The attempt at a solution Ok what I did was I tried to solve for t and get equations for the angle, but my lack of trig gets in the way. Ok for no better thing to use let =theta. I get 1000cos()t=2000 so cos()t=2. Then for the y component I get 800=sin()t-4.9t^2. I solved here for t with the quadratic equation. Substituting the resulting gives me 19.6=500sin(2)+64sqrt[15625sin^2()-245]. I don't know how to solve for . Help please! Thank you!