Polar Curve Equation Confusion

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SUMMARY

The discussion clarifies the meaning of the polar equation notation "F(r,θ) = 0," which indicates that F is a function of two variables, specifically mapping points in a plane to real number values. The focus is on identifying the zeros of F, which are the points where the function equals zero. A practical approach to derive F from a given function f is to define it as F(r,θ) = r − f(θ). This formulation is essential for understanding polar curves in mathematics.

PREREQUISITES
  • Understanding of polar coordinates and polar equations
  • Familiarity with functions of multiple variables
  • Basic knowledge of graphing techniques in mathematics
  • Ability to manipulate algebraic expressions
NEXT STEPS
  • Study the properties of polar coordinates and their applications
  • Learn how to graph polar equations using software tools like Desmos
  • Explore the concept of zeros of functions in multivariable calculus
  • Investigate transformations of polar equations and their implications
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Students studying mathematics, particularly those focusing on polar coordinates and equations, as well as educators looking to clarify concepts related to polar curves.

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Homework Statement
The graph of a polar equation is r=f(θ), or more generally F(r,θ) = 0, ...
Relevant Equations
NONE.
What does "F(r,θ) = 0" mean here?
 
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lightlightsup said:
Homework Statement:: The graph of a polar equation is r=f(θ), or more generally F(r,θ) = 0, ...
Relevant Equations:: NONE.

What does "F(r,θ) = 0" mean here?
The notation, F(r,θ) suggests that F is a function of two variables, or a function of an ordered pair. Likely it maps individual points in a plane each to a real number value. However in the case here, you are only interested in the zeros of F, i.e. you are only interested in those point which get mapped to zero.

A simple way to get a suitable function F, if you have the function f, is to define F as:

F(r,θ) = r − f(θ)
 
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