# maths

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-

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1. |A+B|^2 = 2^2 + 2^2 - 2(2)(2)cos 120°

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posted by Steve
2. 2 along +X axis

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