A golfer is a putting on a green, and takes 3 strokes to "hole the ball" On the first putt the ball rolls 5.0m due east. The second putt travels 2.1 m at an angle of 20.0 degrees north of east. The third putt is 0.50m due north. What displacement (magnitude and direction relative to due east) would have been needed to "hole the ball" on the very first putt?
R^2 = A^2 + B^2 - 2ab COS(angle)
The Attempt at a Solution
I drew them out. I have troubles finding the displacement with 3 directions given.