New posts in conic-sections

What are the main steps of determining the inequality by its given graph?

How to find an ellipse , given 2 passing points and the tangents at them?

What do cones have to do with quadratics? Why is $2$ special?

Lampshade Geometry Problem

How to find centre,vertics,foci,focal radii,letus rectum... when exists of a general quadratic equation in x and y

The locus of the intersection point of two perpendicular tangents to a given ellipse

How to get the correct angle of the ellipse after approximation

Parabola is an ellipse, but with one focal point at infinity

What is the general equation of the ellipse that is not in the origin and rotated by an angle?

How to determine the arc length of ellipse?

Find the area of largest rectangle that can be inscribed in an ellipse

Eccentricity of an ellipse

Using Gröbner bases for solving polynomial equations

Why does $\cos(x) + \cos(y) - \cos(x + y) = 0$ look like an ellipse?

Check if a point is within an ellipse

Do "Parabolic Trigonometric Functions" exist?

Solving a homogeneous quadratic equation in three variables over the integers.

Geometric construction of hyperbolic trigonometric functions

Modelling the "Moving Sofa"

Finding Intersection of an ellipse with another ellipse when both are rotated