The problem I have to solve is: If tangent lines to ellipse $9x^2+4y^2=36$ intersect the y-axis at point $(0,6)$, find the points of tangency.
How to find points of tangency on an ellipse?
2
$\begingroup$
calculus
geometry
conic-sections
-
0You are missing some $y^2$ somewhere in your expression. Can you take a look at it again? – 2011-10-16
-
1None of the ([multivariable-calculus](http://en.wikipedia.org/wiki/Multivariable_calculus)), ([elliptic-curves](http://en.wikipedia.org/wiki/Elliptic_curve)) or ([elliptic-functions](http://en.wikipedia.org/wiki/Elliptic_function)) tags are representative of this question. – 2011-10-16