# Points of Intersection.

1. Jul 10, 2011

### jjeddy

1. The problem statement, all variables and given/known data

I need to find the 2 points of intersection (in polar form) of the two curves.

I know just by looking that the origin will be one of the points, (0,0)

3. The attempt at a solution

I have approached this two different ways,

1. set them equal to each other and tried to simplify.

Which approach should i use?

Last edited: Jul 11, 2011
2. Jul 10, 2011

### jjeddy

OK, i used tanθ=sinθ/cosθ and i solved for θ

i can substitute back in to get my corresponding (r,θ) r point and i should have my point right?

Last edited: Jul 11, 2011
3. Jul 10, 2011

### SammyS

Staff Emeritus
Right. That gives you one of the points. I'm not quite sure how you came up with your answer of θ=π/4 , so it's difficult to suggest how you should come up with the second point.

4. Jul 10, 2011

### jjeddy

Is that right?

I think that is my polar coordinate where it intersects

Last edited: Jul 11, 2011
5. Jul 10, 2011

### SammyS

Staff Emeritus
Your first post states that you need to find the 2 points of intersection.

For what other value of θ, is tan(θ) = 1 ? What is the period of the tangent function?

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