## 90 Reputation

1 years, 261 days

## @rlopez  Can you tell more clearly...

Can you tell more clearly how to set the distance to 0? As I understand, distance(L1,L2) is a command to find the distance between 2 given lines. I don't know how to use it when the distance is known and the equations of the lines are unknown

## @vv  The solution is really great!...

The solution is really great! Fast and compact. Unfortunately I have no almost knowledge of linear algebra (vectors, matrices, ...). In my country, linear algebra is only taught at university level to students majoring in engineering, while I am a medical doctor myself.

## @rlopez Thank you a lot for your help!&...

@rlopez

Thank you a lot for your help!

## @Kitonum  Thank you very much for ...

Thank you very much for your kind help!

## @Rouben Rostamian   Thank you very...

Thank you very much for your help!  Maple is a great math software, but for me, a novice, it is difficult to use.

## @vv  Thank you so much for your he...

Thank you so much for your help!

## @Rouben Rostamian   Let A and B be...

Let A and B be the intersection of d with d1, and d2 respectively. The coordinates of A (xa,ya,za), B(xb,yb,zb) are the solutions of the system of equations describing the line d with the equations of d1 and d2. Since M, A and B are in line, (xa-xm)= k(xb-xm), (ya-ym)=k(yb-ym),(za-zm)=k(zb-zm). Solve the system of equations to determine the solutions t1, t2 and k. Then determine the equation of d.

## @Kitonum  Thanks very much! If you...

Thanks very much! If you don't mind, can you help me write commands to solve this problem in the direction of finding the coordinates of the point M', which is the projection of M onto the plane (P), where M' is the solution of the system of equations in the center of the plane. The sphere has center M, radius = 1/4 and plane (P). As a newbie to Maple I'm having a hard time writing commands.

## @Kitonum  I am still confused in s...

I am still confused in solving the problem. Suppose the conditions are satisfied, for example, the distance between point M to the plane (P) is now =1/4 (less than the distance to the line d, please help me solve it with the commands by Maple Thank you very much!

## @Kitonum  Wow! How did I solve it?...

Wow! How did I solve it?! The two equations are defined as: 5x+3y+z-8=0 and 3x+5y-z=0. Maybe I'm making a mistake again (?!) I'll check again.

## @Kitonum  I didn't check the a...

I didn't check the alignment of point M with line d, just trying to find the solution! My error!. Thank you so much.

## @tomleslie  Thank you very much. M...

Thank you very much. Maple asked me to email the development team to describe the bugs. You did it for me and many other users.

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