No need for finding / calculating any phi or angle here. Just simpler than it is written.
Project Euler: Problem 9, Pythagorean numbers
Getting the row and column location from a matrix
Getting the indices from a matrice
MATCH THE STRINGS (2 CHAR) very easy
Find the Kronecker Tensor Product without using KRON
Find the definite integral of various linear functions
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 largest value in the 3D matrix
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