1. The problem statement, all variables and given/known data A model rocket has been fired with V0=50m/s at 35 degrees above horizontal. Find magnitude and direction at t=4s. 2. Relevant equations V = V0+at, displacement = v0t + .5at2 3. The attempt at a solution I have successfully found the magnitude by setting Vx= 50*cos35 and Vy = 50sin35 -4g then taking the square root of each direction squared to find the magnitude is equal to 42.289 m/s. I am having trouble now, figuring out what to do to figure out the direction. I have calculated displacement of x to be 163.83m and displacement of y to be 36.32m by using the displacement equation. Any hints on how to find the angle? I thought inverse tangent of y/x would give me the correct displacement, however it did not.