Solve Polar to Cartesian Equation & Identify Graph

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SUMMARY

The discussion focuses on converting the polar equation r = 2cos(x) + 2sin(x) into its Cartesian equivalent. The initial steps involve using the relationships x = rcos(x) and y = rsin(x) to express the equation in Cartesian coordinates. The suggestion to multiply the polar equation by r is crucial for simplifying the conversion process. Ultimately, the goal is to identify the graph represented by the Cartesian equation derived from the polar form.

PREREQUISITES
  • Understanding of polar and Cartesian coordinate systems
  • Familiarity with the equations x = rcos(θ) and y = rsin(θ)
  • Basic knowledge of trigonometric functions
  • Ability to manipulate algebraic equations
NEXT STEPS
  • Learn how to convert polar equations to Cartesian equations
  • Study the properties of polar graphs and their Cartesian counterparts
  • Explore the use of trigonometric identities in equation transformations
  • Investigate graphing techniques for polar and Cartesian equations
USEFUL FOR

Students studying mathematics, particularly those focusing on calculus and analytical geometry, as well as educators teaching polar and Cartesian coordinate systems.

RESmonkey
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Homework Statement



Replace the polar equation by an equivalent Cartesian (rectangular) equation. Then identify or describe the graph.

****Let's just make x = theta because I can't find a theta symbol*****

r = 2cos(x) + 2sin(x)


Homework Equations



none?

The Attempt at a Solution



x = rcos(x) = (2cos(x) + 2sin(x)) * cos(x)
y = rsin(x) = (2cos(x) + 2sin(x)) *sin(x)

No idea what do to from here.


Thanks in advance
 
Physics news on Phys.org
Try multiplying r = 2\cos\theta + 2\sin\theta through by r.
 

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