Chapter 3, Problem 59P

$\stackrel{\to }{A}$ has the magnitude 12.0 m and is angled 60.0° counterclockwise from the positive direction of the x axis of an xy coordinate system. Also, $\stackrel{\to }{B}$ = (12.0 m) $\hat{i}$ + (8.00 m) $\hat{j}$ on that same coordinate system. We now rotate the system counterclockwise about the origin by 20.0° to form an x′y′ system. On this new system, what are (a) $\stackrel{\to }{A}$ and (b) $\stackrel{\to }{B}$, both in unit-vector notation?