Coordinate operation of vector Given m = (1,0), n = (1 / 2, (√ 3) / 2), a = m + 2n, B = 2m-3n., then the angle between a and B is

a = m + 2n = (1, 0) + 2(1/2, √3/2) = (2, √3)b = 2m - 3n = 2(1, 0) - 3(1/2, √3/2) = (1/2, -3√3/2)cos = (a • b)/(∣a∣∣b∣) = [2*(1/2) + √3*(-3√3/2)] / { [√(2²...

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