The hyperbola command draws hyperbolas and other conic
sections.
hyperbola can take parameters in different forms.
hyperbola can take one argument: eqn, a second degree equation in the
variables x and y (or an expression which will be set to zero).
hyperbola(eqn) returns and draws
the conic section given by the equation eqn.
Example. Input:
hyperbola(x^2 - 2*y^2 - 1)
Output:
hyperbola can take three arguments:
A,B, two points.
C, a point or a real number.
hyperbola(A,B,C) returns and draws the hyperbola
with foci A and B and passing through C (if C is a point) or
whose semi-major axis has length C (if C is a real number).
Note that if the third argument is a point on the real axis, the
real affix of the point won’t work, it needs to be specified with
the point command.
