Vectors A and B are in the xy plane and have the same length. Vector A starts at the origin and is at an angle of 45 degrees above the positive x-axis. Vector B starts at the origin and is at an angle of 45 degrees below the positive x-axis. Which of the following best describes the resultant vector formed when vectors A and B are added?
A vector that is shorter than A or B and points along the positive x-axis.
A vector that is longer than A or B and points along the positive x-axis.
A vector equal in length to A or B and points along the positive x-axis.
These vectors cancel out, so the resultant is zero.