Convert rectangular to polar two dimensional coordinates using a calculator.
The rectangular coordinates (x,y) and polar coordinates (R,t) are related as follows.
y = R sin t and x = R cos t
R^{2} = x^{2} + y^{2} and tan t = y/x
The calculator finds R using R = sqrt(x^{ 2} + y^{ 2}). Then finds the quadrant using the signs of x and y and solve any of the equations
x = R cos t or y = R sin t
for t such that t is in the range (π , π] or (180° , 180°].
How to use the calculator
1  Enter x and y and press the button "enter".
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