Webwork and MasteringPhysics Homework Help: Problem 1.71

You are to program a robotic arm on an assembly line to move in the xy-plane. Its first displacement is $\vec A$ ; its second displacement is $\vec B$ , of magnitude

6.40

and direction 62.6 $^\circ$ measured in the sense from the +x-axis toward the -y-axis. The resultant $\vec C= \vec{A} + \vec{B}$ of the two displacements should also have a magnitude of 6.40

, but a direction 22.5 $^\circ$ measured in the sense from the +x-axis toward the +y-axis.

Part A