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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

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1. satellite73

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

2. satellite73

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

Thank you, that equation actually helps!

4. satellite73

yw