No need for finding / calculating any phi or angle here. Just simpler than it is written.
Find the sum of the elements in the "second" diagonal
Make a random, non-repeating vector.
Binary code (array)
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Solve the set of simultaneous linear equations
Is A the inverse of B?
Create a square matrix of multiples
Find the largest value in the 3D matrix
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