## joseebell Group Title What are the directrices of the hyperbola given by the equation y^2/49-x^2/9=1 one year ago one year ago

1. satellite73 Group Title

i am confused because so far as i know a hyperbola does not have a directrix

2. satellite73 Group Title

it does have two asymptotes however the asymptotes for $\frac{y^2}{a^2}-\frac{x^2}{b^2}=1$ are$y=\pm\frac{a}{b}x$

3. joseebell Group Title

Thank you, that equation actually helps!

4. satellite73 Group Title

yw