I took complements of the test case polar angles in order to agree with customary definitions of polar angle.
I agree. Polar angles are, by convention, measured from the pole, but in this problem you have to consider them to be measure from the equator if you wish to agree with the test cases.
Finding Perfect Squares
Sorted highest to lowest?
Project Euler: Problem 5, Smallest multiple
Get the length of a given vector
Who invented zero?
Determine if a Given Number is a Triangle Number
Recurring Cycle Length (Inspired by Project Euler Problem 26)
Specific Element Count
Number of Circles in a Number
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