Given 2 pairs of cartesian co-ordinates, determine the angle between the 2 vectors formed by the points and the origin. Angle must be in [0,180] and in degrees.
[0 1;2 0]
[1 1;-2 0]
[1 1;2 2]
Distance walked 3D
Back to basics 23 - Triangular matrix
Make a vector of prime numbers
Convert radians to degrees
Write c^3 as sum of two squares a^2+b^2
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