A crow flies in two successive displacements to a point that is 80 m to the west. Its first displacement is 80 m in a direction θ = 55° west of north.
(a) What is the magnitude of its second displacement?
(b) What is its direction as measured by the angle θ measured west from north?
im still not getting the right answer but i think you are suppose to use (R^2)=(a^2)+(b^2)-2abcos(angle) to find R=... for part A which is the part im really confused on