The result of "1/3 mod 7" is "5",how to understand it?What's the syntactic rule behind it?

hello,

I have a .txt file with 1000 lines of data.

This data was collected from an electronic compass located in a car moving in different directions.

Each line was written in function of time,every 0.1s.

Each line has 4 columns, and each column represents a cardinal point.

1st column--->North, 2nd column--->East, 3rd Column South---> 4th column West

768------768------768------2

768------768------768------2…

This is an animation which I learn a maplesoft blog written by Mr. Robert Lopez. As the animation illustrated, the red segment is the normal to the green curve(y=x^2). One endpoint (assuming point1) of the segment is the intersection of the normal and the blue curve(y=x^2+1). But when running the animation, it seems that the red segment becomes unexpected when -0.5<a<0.5.

The last question im going to be asking for a while.

Im trying to find a function which in the form of a spiral crosses the x-axis at 45 degrees. Now i can only think of one function that fufills this, that would be the tan function since at Pi/4 it would give me 1 fulfulling my question. But making a function which fufills it not so easy, i know i have to use the polar differentiation but im having trouble inputting it into maple

Any help?

Thank you!

Why isn't DEplot working when my syntax is correct? The equation will plot in one worksheet but not in another?

I tried to install a trial version of Maple on a notebook. After the selft extraction of the installer the rest of the proces is stopped without error messages. The notebook is a modern multi-proc.64-bit  Win 7 correspondent to the software version I tried to install. The question is what to do to solve the problem.

Hello,

I would like someone to help me with this issue I have.

First after some operation I found the following equation:

> m := (x(q))^2 + x(q)

and then I'm creation a function like this:

> eq := q -> m

but then maple is not substituting the equation m inside the function I created, how can I do that, I must work with functions this way and I'll be working with bigger equations but I don't want to copy/paste or type them into the function.

How do you find the intersection of 2 subspaces of R4

v1= [x(1,2,3,4)+y(0,2,3,2)]

v2= [x(3,2,1,1)+y(3,1,1,3)+z(6,4,2,2)

Hi all,

I need to:

a) Find the equation of the sphere passing through the 4 points [- 8, 3, 11], [5, - 7, 1], [- 15, 4, - 6], [10, 2, 9].  Give the coordinates of its center and its radius.

b) Plot together the sphere of part a along with the 4 points of the dataset.

I can't seem to get maple to do this!  I am very frustrated as the sphere command doesn't even seem to work.  I am a total maple n00b...

Download 321.mw

There is a problem which I feeling very puzzling, it is not the codes, but about when running the codes. It seems that if I running the codes immediately (or use "run all the worksheet" ), an error returned unexpectedly, but if I wait a few seconds before rerunning the code which just causes the error, a correct result returned. I feel very...

When I am trying to write the data of the following program in a datafile

restart

with(plots)

eq := (diff(G(eta), `$`(eta, 2)))/Pr-2*n*b*eta*G(eta)+(a+(1/2)*b*eta*eta)*(diff(G(eta), eta))

> A := {x=0, y=0}:

> B := {x=0, -y=0};

> {A} union {B};

{{x=0, y=0},{x=0, -y=0}}

How to get Maple to realise that A and B are actually the same so that "{A} union {B}" would return "{{x=0, y=0}}" instead of above?

Thanks in advance.

How to join expressions in the set, for example to convert the set {y=0, x>-1, x<1} to {y=0, -1< x <1}?

Thank you in advance.

Hi all,

when drawing a geometry.line object by using geometry.draw, the default for each axis is -10..10, so that I cannot see in the plot, for example, the line y=11;

How can I extend this range?

Best regards

Ouba