Chapter 3, Problem 2P

Vector $\stackrel{\to }{A}$ has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. Vector $\stackrel{\to }{B}$ also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum $\stackrel{\to }{A}$ + $\stackrel{\to }{B}$ and (b) the vector difference $\stackrel{\to }{A}$ − $\stackrel{\to }{B}$.