Question

Locus of the center of the circle of radius $a$,which always intersects coordinate axes

score 829 · Answer 1 · 2016-06-07 03:52:06

829

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Locus of the center of the circle of radius $a$,which always intersects coordinate axes

Published on 07 Jun 2016 - 3:52

score 57 · Answer 2 · 2016-06-07 06:40:13

57

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Prove that as $PP'$ varies,the circle generates the surface $(x^2+y^2+z^2)(\frac{x^2}{a^2}+\frac{y^2}{b^2})=x^2+y^2.$

Published on 07 Jun 2016 - 6:40

score 7.9k · Answer 3 · 2026-03-31 10:13:42

7.9k

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Find the equations of the tangent planes to the sphere $x^2+y^2+z^2+2x-4y+6z-7=0,$ which intersect in the line $6x-3y-23=0=3z+2.$

Published on 31 Mar 2026 - 10:13

score 6.8k · Answer 4 · 2026-03-31 10:13:43

6.8k

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Find the equation of the sphere which touches the sphere $x^2+y^2+z^2+2x-6y+1=0$ at $(1,2,-2)$ and pass through $(1,-1,0)$

Published on 31 Mar 2026 - 10:13

score 379 · Answer 5 · 2026-03-31 01:02:14

379

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score 743 · Answer 6 · 2026-04-02 15:23:48

743

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Quaternion interpolation in 3D

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score 281 · Answer 7 · 2016-06-09 21:51:04

281

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score 742 · Answer 8 · 2016-06-10 01:14:50

742

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Plotting a 3D graph from explicit equation

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score 2.9k · Answer 9 · 2016-06-11 05:52:48

2.9k

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Can two lines lying in different plane be parallel?

Published on 11 Jun 2016 - 5:52

score 129 · Answer 10 · 2026-03-28 14:05:30

129

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Published on 28 Mar 2026 - 14:05

score 54 · Answer 11 · 2016-06-13 16:54:04

54

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Draw a line between an observer and the current direction of the sun

Published on 13 Jun 2016 - 16:54

score 576 · Answer 12 · 2016-06-15 11:11:56

576

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Published on 15 Jun 2016 - 11:11

score 1.4k · Answer 13 · 2026-04-04 02:26:12

1.4k

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Euler Angle + Distance to XYZ coordinate

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score 42 · Answer 14 · 2026-03-28 03:53:42

42

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score 793 · Answer 15 · 2026-04-03 03:19:59

793

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Can there be a limit cycle without a fixed point in 3D space?

Published on 03 Apr 2026 - 3:19

List Question

Locus of the center of the circle of radius $a$,which always intersects coordinate axes

Prove that as $PP'$ varies,the circle generates the surface $(x^2+y^2+z^2)(\frac{x^2}{a^2}+\frac{y^2}{b^2})=x^2+y^2.$

Find the equations of the tangent planes to the sphere $x^2+y^2+z^2+2x-4y+6z-7=0,$ which intersect in the line $6x-3y-23=0=3z+2.$

Find the equation of the sphere which touches the sphere $x^2+y^2+z^2+2x-6y+1=0$ at $(1,2,-2)$ and pass through $(1,-1,0)$

How to compute the pivot point of a rectangular cuboid to achieve a certain rotation?

Quaternion interpolation in 3D

A 3d integral over a ball

Plotting a 3D graph from explicit equation

Can two lines lying in different plane be parallel?

How to determine the equation of shortest path on any 3d surface between two given points?

Draw a line between an observer and the current direction of the sun

Given set of points in 3D, find group of points closest to each other

Euler Angle + Distance to XYZ coordinate

Counting balls in face centred cubic close packing

Can there be a limit cycle without a fixed point in 3D space?

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