Convert polar equation r= 1/1+sin(theta) to rectangular equation

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SUMMARY

The polar equation r = 1/(1 + sin(θ)) can be converted to the rectangular equation x² + y² = (1 - y)². The conversion process involves dividing both sides by r, leading to the equation 1 = 1/(r + r sin(θ)), which simplifies to r + y = 1. This indicates that r can be expressed as r = 1 - y, facilitating the transition from polar to rectangular coordinates.

PREREQUISITES
  • Understanding of polar coordinates and their relationship to rectangular coordinates.
  • Familiarity with trigonometric functions, particularly sine.
  • Basic algebraic manipulation skills.
  • Knowledge of the Cartesian coordinate system.
NEXT STEPS
  • Study the conversion techniques between polar and rectangular coordinates.
  • Learn about the implications of trigonometric identities in coordinate transformations.
  • Explore the use of graphing tools to visualize polar and rectangular equations.
  • Investigate advanced topics in polar equations, such as conic sections in polar form.
USEFUL FOR

Students in mathematics, particularly those studying calculus or analytical geometry, as well as educators looking for clear examples of polar to rectangular conversions.

Elissa89
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The equation is:

r= 1/1+sin(theta)

I know the answer is supposed to be:

x^2+y^2=(1-y)^2

I can't figure out the steps to get to the answer.
 
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Elissa89 said:
The equation is:

r= 1/1+sin(theta)

I know the answer is supposed to be:

x^2+y^2=(1-y)^2

I can't figure out the steps to get to the answer.

$r = \dfrac{1}{1+\sin{\theta}}$

divide both sides by $r$ ...

$1 = \dfrac{1}{r+r\sin{\theta}} \implies r+r\sin{\theta} = 1$

$r + y = 1$

$r = 1 - y$

can you finish?
 
skeeter said:
$r = \dfrac{1}{1+\sin{\theta}}$

divide both sides by $r$ ...

$1 = \dfrac{1}{r+r\sin{\theta}} \implies r+r\sin{\theta} = 1$

$r + y = 1$

$r = 1 - y$

can you finish?

Yes Thanks
 

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