Question 1032074
{{{x^2-y^2=36}}}

<==> {{{(rcos(theta))^2  - (rsin(theta))^2 = 36}}}

<==> {{{r^2(cos^2(theta) - sin^2(theta) )= 36}}}

<==> {{{r^2(cos(2*theta)) = 36}}}

<==>  {{{r^2 = 36sec(2*theta)}}}