find the first elements of a column matrix
This would be better as "find the nth element of an array." Also, a column matrix doesn't exist. Perhaps you meant column vector, though the variables in your test cases are row vectors.
Angle between two vectors
convert matrix to single column
UICBioE240 problem 1.6
Find the area of a triangle
Find the last digit
find the mean of all elements in a matrix
Calculating selling price
find a specific element from an matrix
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