No need for finding / calculating any phi or angle here. Just simpler than it is written.
2 b | ~ 2 b
Back to basics 12 - Input Arguments
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Find the "ordinary" or Euclidean distance between A and Z
Is this matrix orthogonal?
Find the largest value in the 3D matrix
Solve the set of simultaneous linear equations
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