# Math Help - Polar Equation

1. ## Polar Equation

I have a problem on writing a polar equation as an equation in rectangular coordinates.

The problem is r2 tan θ = 1

In my attempts at the problem, I did:

r2tanθ = 1
r2(y/x) = 1
(x2+y2)(y/x) = 1

After my last step, I'm not sure what to do next.

2. ## Re: Polar Equation

Originally Posted by Smugleaf
I have a problem on writing a polar equation as an equation in rectangular coordinates.

The problem is r2 tan θ = 1

In my attempts at the problem, I did:

r2tanθ = 1
r2(y/x) = 1
(x2+y2)(y/x) = 1

After my last step, I'm not sure what to do next.
just multiply it out

$\left(x^2+y^2\right)\frac{y}{x}=1$

$\left(x^2+y^2\right) y = x$

$x^2y+y^3-x=0$