Please dont use cos(x) directly
True, but still not following the instruction. (Although not as shameless as some other submissions.)
Euler's formula is the most beautiful equation
Back to basics 11 - Max Integer
Is this triangle right-angled?
Sum the squares of numbers from 1 to n
Find the sum of n squares
Change matrix to vector
Rotate matrix by -90 degrees
Create tangent function out of cosine only
Find my daddy long leg (No 's')
Create tangent function out of sine function only
Recursion at variable input
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