Finding Polar Equation for hyperbola with Graph xy=16

[Magnawolf]

Homework Statement

Find a polar equation with the graph as xy=16

Homework Equations

r = ed/(1+- cos\theta)? I'm not really sure at all.

The Attempt at a Solution

I also tried using x = rcos\theta and y = r sin\theta but I can't get anything. I know it's a hyperbola.

 

[ehild]

Homework Statement

Find a polar equation with the graph as xy=16

The Attempt at a Solution

I also tried using x = rcos\theta and y = r sin\theta but I can't get anything. I know it's a hyperbola.

It is all right. How are r and θ related then?

ehild

 

[Magnawolf]

Inversely? I'm not sure!

 

[ehild]

Inversely? I'm not sure!

No, why do you think so?

Just plug in x=rcosθ and y=rsinθ into the original equation xy=16.

ehild