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.
given 3 sides, find area of this triangle
Sum of diagonal of a square matrix
middleAsColumn: Return all but first and last element as a column vector
Average of square wave
Calculate the eigenvalues of A.
Numerate input arguments
Find Adjacency Matrix
Find the sum of the negative elements under the main diagonal.
Solve the system of equations.
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