Notes for converting polar to Cartesian and vice versa
Note for plotting polar coordinate functions
The website Wolfram Alpha is a good resource for plotting. For example, use the instruction
plot r = cos(theta)
To see an accurate picture of a circle with its center at (= ½, 0) and radius = ½, passing through both (0, 0) and (1, 0)
Note: The x-axis is all points of the form (x, 0) in Cartesian coordinates. The form looks exactly the same in Polar coordinates, since the angle 0 is the x-axis.
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