Question

Significance and applications of directrix of a conic

score 87 · Answer 1 · 2026-04-01 05:49:49

87

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Significance and applications of directrix of a conic

Published on 01 Apr 2026 - 5:49

score 87 · Answer 2 · 2026-03-25 19:10:12

87

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Find the invariant conic of an elliptic element of $SL_2(\mathbb R)$

Published on 25 Mar 2026 - 19:10

score 150 · Answer 3 · 2026-03-30 12:00:26

150

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Circle through focii of ellipse

Published on 30 Mar 2026 - 12:00

score 51 · Answer 4 · 2026-04-01 03:37:27

51

Views

Set of points $\left| \frac{z+i\bar z}{2}\right|=\left| z-\frac{1+i}{2}\right|$

Published on 01 Apr 2026 - 3:37

score 2k · Answer 5 · 2026-04-01 10:38:55

2k

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Maximum area of the triangle formed by the chord

Published on 01 Apr 2026 - 10:38

score 15.7k · Answer 6 · 2020-04-29 17:21:05

15.7k

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Why are certain PDE called "elliptic", "hyperbolic", or "parabolic"?

Published on 29 Apr 2020 - 17:21

score 1.2k · Answer 7 · 2026-03-27 14:52:47

1.2k

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Find the equations of two lines through the origin that are tangent to the ellipse equation: $2 {x^2} - 4 x + {y^2} + 1 = 0$

Published on 27 Mar 2026 - 14:52

score 225 · Answer 8 · 2026-03-27 20:30:37

225

Views

maximum inscribed angle within an ellipse

Published on 27 Mar 2026 - 20:30

score 2.9k · Answer 9 · 2026-04-03 04:55:04

A parabola touches the bisectors of the angles formed by lines $x+2y+3=0$ and $2x+y+3=0$ at $(1,1)$ and $(0,-2)$. Find its focus and directrix.

score 717 · Answer 10 · 2026-04-03 04:54:01

717

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Why is $h^2-ab$ the discriminant of the conic with equation $ax^2+2hxy+by^2+2gx+2fy+c=0$?

Published on 03 Apr 2026 - 4:54

score 28 · Answer 11 · 2026-03-29 02:45:43

28

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Smallest box including an ellipse

Published on 29 Mar 2026 - 2:45

score 458 · Answer 12 · 2026-03-26 11:18:33

458

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Is there visual or intuitive explanation of equations of conic sections defined in traditional way?

Published on 26 Mar 2026 - 11:18

score 38 · Answer 13 · 2020-05-03 19:40:03

38

Views

Problem involving chords at vertex of a standard parabola

Published on 03 May 2020 - 19:40

score 40 · Answer 14 · 2020-05-04 20:41:12

40

Views

Let $A;B;C;D;E$ be real numbers such that $A$ is positive and $C$ is negative. The set of points (x; y) that satisfy $Ax^{2} + Bx ....

Published on 04 May 2020 - 20:41

score 120 · Answer 15 · 2020-05-05 11:53:39

120

Views

N Circle touching x-axis and fixed point

Published on 05 May 2020 - 11:53

List Question

Significance and applications of directrix of a conic

Find the invariant conic of an elliptic element of $SL_2(\mathbb R)$

Circle through focii of ellipse

Set of points $\left| \frac{z+i\bar z}{2}\right|=\left| z-\frac{1+i}{2}\right|$

Maximum area of the triangle formed by the chord

Why are certain PDE called "elliptic", "hyperbolic", or "parabolic"?

Find the equations of two lines through the origin that are tangent to the ellipse equation: $2 {x^2} - 4 x + {y^2} + 1 = 0$

maximum inscribed angle within an ellipse

A parabola touches the bisectors of the angles formed by lines $x+2y+3=0$ and $2x+y+3=0$ at $(1,1)$ and $(0,-2)$. Find its focus and directrix.

Why is $h^2-ab$ the discriminant of the conic with equation $ax^2+2hxy+by^2+2gx+2fy+c=0$?

Smallest box including an ellipse

Is there visual or intuitive explanation of equations of conic sections defined in traditional way?

Problem involving chords at vertex of a standard parabola

Let $A;B;C;D;E$ be real numbers such that $A$ is positive and $C$ is negative. The set of points (x; y) that satisfy $Ax^{2} + Bx ....

N Circle touching x-axis and fixed point

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