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]
Project Euler: Problem 5, Smallest multiple
Add two numbers
Sum the real and imaginary parts of a complex number
MATLAB Basic: rounding II
generate number in particular way
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