1. The problem statement, all variables and given/known data A ball is launched from the origin at an angle of inclination of 50 degrees above the xy plane. If the ball lands at coordinates (4,7,0), find the initial velocity of the ball. 2. Relevant equations x=(voCos(50)Cos(theta))t y=(voCos(50)Sin(theta))t 3. The attempt at a solution Unfortunately, I have the answer, but I am unaware of how it was obtained. x=.3189vot y=.5581vot z=vosin(50)t-4.9t^2 z=0 when t=.1563 so vo=sqrt(4/(.3189)(.1563)) = 8.957m/s Can anyone give me some insight as to how the x and y was solved for?