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I know that you can restrict a function's domain in cartesian coordinates by saying x(A)<x<x(B), but is there any way to restrict it based on the angle in the polar coordinate form? I know you can fetch the angle with angle(A), but I'm not sure if I can restrict something like a sinusoid graph with that. Thank you.
The same question 
Without exception every point is stored in Cartesian coordinates.
But you can always evaluate the angle of polar coordinates to any point
relative to origin with: Angle(<Point>)
relativ to an other point with: Angle(Vector(<point1>, <point2>)
.
See attachment
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