Vector A is the length 2cm and 60° above the x-axis in the first quadrant. Vector B is of length 2cm and 60° below the x-axis in the fourth quadrant. The sum vector A+B is a vector of magnitude-

Answer 1

|A+B|^2 = 2^2 + 2^2 - 2(2)(2)cos 120°

Answer 2

2 along +X axis