No need for finding / calculating any phi or angle here. Just simpler than it is written.
Make a checkerboard matrix
Permute diagonal and antidiagonal
Find out missing number from a vector of 9 elements
Who is the smartest MATLAB programmer?
Find the "ordinary" or Euclidean distance between A and Z
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Find the Kronecker Tensor Product without using KRON
Flip the main diagonal of a matrix
Solve the set of simultaneous linear equations
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