Please, don't use cos, tan, cot matlab functions.
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 1D
Count up then down
Sum the Digits of a Number
factorial of a number x
Solve expression II
Find the product of the positive elements above the main diagonal.
Find Adjacency Matrix
Calculate the eigenvalues of A.
Return the length of the longest word in the string.
Calculate the centroid of a triangle
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