A cannon fires a ball at 1000m/s. It needs to hit a target 2000m away horizontally and 800m away vertically. What angle should the cannon be fired at? I used the equation h=v^2*sinx^2/[2g] 800=1000^2 * sinX^2 / [2(9.8)] however, I gt 7.2 after I crunch out the numbers. The answer in to book says about 22 degrees. what am I doing wrong?