# Thread: hyperbola

1. ## hyperbola

the two concentric rectangular hyperbolas whose axes meet at angles of 45 degree cut at

2. Originally Posted by prasum
the two concentric rectangular hyperbolas whose axes meet at angles of 45 degree cut at
There are 4 hyperbolas involved:

$x^2-y^2=1$ ..... or ..... $-x^2+y^2=1$

$2 x y=1$ ........... or ........ $-2 x y=1$