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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _bend_cos_low(a, b, deriv):
 """Similar to bend_cos, but with relative vectors"""

    a = Vector3(6, deriv, a, (0, 1, 2))
    b = Vector3(6, deriv, b, (3, 4, 5))
    a /= a.norm()
    b /= b.norm()
    return dot(a, b).results()