How would I find a Cartesian equation for r = 4secx?

Thanks.

Printable View

- Sep 8th 2013, 04:34 PMShadow236Finding a Cartesian equation for an r value
How would I find a Cartesian equation for r = 4secx?

Thanks. - Sep 8th 2013, 06:15 PMSorobanRe: Finding a Cartesian equation for an r value
Hello, Shadow236!

Quote:

$\displaystyle \text{How would I find a Cartesian equation for: }\: r \,=\, 4\sec\theta\,?$

I will assume you know the conversion identities.

We have: .$\displaystyle r \:=\:\frac{4}{\cos\theta} \quad\Rightarrow\quad r\cos\theta \:=\:4 \quad\Rightarrow\quad x \,=\,4$ - Sep 9th 2013, 03:49 PMShadow236Re: Finding a Cartesian equation for an r value
This makes sense. Thank you!