without usung available builtin functions

V A vector can be represented by either its rectangular coordinates (x and y) or by its polar coordinates (r and ). For positive values of x and y, the conversion from rectangular to polar coordinates in the range from 0 to 2nt are given by: r= x2 + y2 0 = tan-?(y/x) Use MATLAB to convert rectangular coordinates (x and y) to polar coordinates (r and 6). Test the code to find values of rand 0 when x = 3 andy -4