1. The problem statement, all variables and given/known data Jane walks 400m due South, then 250m in the direction S 85 degrees W, and finally 180m in the direction N 20 degrees E. Determine the magnitude and direction of her resulting displacement, relative to her starting point. 2. Relevant equations None, I don't think. 3. The attempt at a solution Well, I've gotten as far as trying to determine the magnitude of the second (250m) vector. My question is though, as she's heading south, does that mean that the vector is negative? Also, I'd also like to check with you very brainy, very lovely folks - the angle I've used for the ||AB||cos theta i etc is -95 degrees, as I've gone in the clockwise direction from the x-axis (90+90+85 = 265 degrees, then subtracting that from 360 degrees to give the negative 95 degrees). I was sick when we did vectors in class, so I apologise if I've made some very glaring mistakes, but any help would be greatly appreciated.