1. The problem statement, all variables and given/known data As an aircraft approaches landing, the components of its position are given by: x=81t y=500-27t Velocity vector of aircraft during descent is given by: 81m/s (i hat) + -27m/s (j hat) The value of the speed during the descent is: 85.381m/s What angle does the velocity vector make with the horizonal? 2. The attempt at a solution I tried the Law of Sines sin90/85.381=sina/-27 and sin90/85.381=sina/81 but the angles of this triangle other then 90 are not what they are looking for. What do they mean horizontal?? help!