6 articles trouvés pour ce sujet.
 |
|
|
|
|
|
|
|
|
A curve in 3-space |
2013-02-14 |
|
pardeep pose la question :
we have to show that the curve r(t)=(cos t)i+(sin t)j+(1-cos t)k ,0<=t<=2pie;
is an ellipse by showing it to an intersection of a right circular cylinder and a plane.
i got the eqn. of the cylinder but did not get the eqn of plane.
Harley Weston lui répond. |
|
|
|
|
|
|
Two coplanar lines |
2007-08-21 |
|
Robin pose la question :
I am going two show that the two lines are coplanar:
(x-5)/4=(y-7)/4=-(z+3)/5
(x-8)/7=y-4=(z-5)/3
I know I have to find a point that lie on both lines, but dont really get it.
Stephen La Rocque and Penny Nom lui répond. |
|
|
|
|
|
|
Distance in 3-space |
2002-08-16 |
|
David pose la question :
The question is: how do I figure out the distance of one object in 3D space to another object in 3D space? I have an object at say x = 5.872, y = 2.876, and z = 7.290; and the other object is at x = 1.129, y = -8.213, and z = -11.127. I have been suggested to use the pythagorean theory on this, but since there are three variables, I don't understand how.
Penny Nom lui répond. |
|
|
|
|
|
|
A set of points in space |
2002-03-18 |
|
Victoria pose la question :
Describe the given set with a single equation or a pair of equations: The set of points in space that lie 2 units from the point(0,0,1) and at the same time 2 units from the point (0,0,-1).
Penny Nom lui répond. |
|
|
|
|
|
|
A line in 3 dimensions |
2001-10-17 |
|
Murray pose la question :
I'm working on a complicated proof and i need the equation for a line in 3 dimensions.
Claude Tardif lui répond. |
|
|
|
|
|
|
Intersection of planes |
1998-11-22 |
|
Dave Rasmussen pose la question :
I am a teacher of secondary mathematics with a question about the uses of Three Dimensional Co-ordinate Geometry. I have been teaching my students to write equations of planes and lines, - to find the intersection of these and the distance between them. What I am having difficulty finding are good applications of these techniques to "real world" situations. Can anybody help me?
Walter Whiteley and Harley Weston lui répond. |
|
|
