Angle between two vectors
Check if number exists in vector
Sum the elements in either diagonal of a square matrix
Insert zeros into vector
Area of a Square
Set the array elements whose value is 13 to 0
Wind outward from the center ...
Remove the two elements next to NaN value
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Find all the zeros of sinus , cosinus and tangent in a given interval
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