As per Solution 1043996, need to ban a couple of other functions to enforce instruction.
This is wrong. For example, x = 3*pi/4, cot(x) = -1; but this solution gives sqrt(1-sin(x)^2)/sin(x) = 1.
Distance walked 3D
Bottles of beer
Reverse the elements of an array
UICBioE240 problem 1.18
Check if a string starts with another string
Solve the system of equations.
Return the amount of palindromes (words) in the string.
Find the product of the positive elements above the main diagonal.
Solve the following boundary value problem
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