No need for finding / calculating any phi or angle here. Just simpler than it is written.
The Answer to Life, the Universe, and Everything
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Area of a Square
Beginner's Problem - Squaring
Flip the main diagonal of a matrix
Find the nearest integer
Pythagorean perfect squares: find the square of the hypotenuse and the length of the other side
Find the Kronecker Tensor Product without using KRON
Solve the set of simultaneous linear equations
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