No need for finding / calculating any phi or angle here. Just simpler than it is written.
Distance walked 3D
Back to basics 1 - Saving
Back to basics 8 - Matrix Diagonals
Back to basics 21 - Matrix replicating
Test if two numbers have the same digits
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Pythagorean perfect squares: find the square of the hypotenuse and the length of the other side
Is A the inverse of B?
How many days does the cat take to climb out of the hole?
Find the nearest integer
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