Expressing polar equation as a Cartesian equation

[Bipolarity]

Homework Statement

Express the following equation in Cartesian form
r = 1 - cos(θ)

Homework Equations

x = r*cos(θ)
y = r*sin(θ)
r^{2} = x^{2} + y^{2}
tan(θ) = \frac{y}{x}

The Attempt at a Solution

I have no idea... a hint would be nice thanks!

BiP

 

[gabbagabbahey]

Homework Statement

Express the following equation in Cartesian form
r = 1 - cos(θ)

Homework Equations

x = r*cos(θ)
y = r*sin(θ)
r^{2} = x^{2} + y^{2}
tan(θ) = \frac{y}{x}

The Attempt at a Solution

I have no idea... a hint would be nice thanks!

BiP

If x=r\cos\theta, what is \cos\theta? If x^2+y^2=r^2, and r\geq 0, what is r?

 

[Bipolarity]

If x=r\cos\theta, what is \cos\theta? If x^2+y^2=r^2, and r\geq 0, what is r?

Thanks!

BiP