Let us  consider  the angle  --  arctan(1/ 
(5^(1/2)-1)*(10+2*5^(1/2))^(1/2)). By  using Wolfram Alfa  I can 
simplify it   to 2*Pi/5. But I cant  do the  simplifycation with 
Maple! Anyone can help? 

> u := 0.4e-1;
                              0.04
> k := 2.536427;
                            2.536427
> s := 9.466073;
         ...

Hello,

I have a two expressions...

on in terms of

sin(1/2*B*L) and sinh(1/2*B*L)

and another in terms of

sin(B*L) and sinh(B*L)

I'd like to use a half angle formula on the first to get it in terms of "B*L", then make a substitution into the second...I can't seem to figure out how to make maple do a 1/2 angle expansion....

any suggestions?

How can I use 'evalr' and 'shake' for functions (in a relative or absolute sense)?

What I see in the help is the result for disturbing the input to a function (by decimal digits).

But I want ranges for the output, if the function itself is disturbed, not only the input
(giving resulting error ranges, even for exact input).

Any idea?

I am thinking that the integral of int(cos(k*theta), theta=-pi..pi);

is zero for k =1,2,3,4,5..., since the sin(Pi); is zero

When I evaluate this integral in maple

int(cos(k*theta), theta=-pi..pi);

Hello,

I am trying to import some data into Maple from an Excel sheet that contains three columns.

Column 1 is simply an index number for the measurement running from 1 to 3185.

Column 2 is the time of the measurement ( e.g 10:23:44 ) with Excel formatting as "time".

Column 3 is the measured CO2 concentration logged at the psecific time.

My problem is that when I import the data into Maple using the ExcelTools,Import or simply the Import...

Hello Maple wizards,

I am working with thousands of fairly large (at least 11K nonzero entries) strictly lower triangular Arrays containing positive and negative floating point numbers, including float(1,infinity). The Arrays are the same size and each one can be processed independently, so I hope to avoid a space explosion by having each Array overwrite the previous one -- lhs(entry) and all that. I do see a steady leakage not recovered by gc, but that's not tonight's question.

Hi group,

I am stumped and would appreciate some advice.  I'm trying to use the piecewise function in the context of dsolve,numeric.  As a simple example:

piwz := piecewise(S(t) < 40000, 0, S(t) >= 40000, 1);

eq1 := diff(S(t), t) = k1*S(t)-k2*S(t)*piwz

In this example, I want the value of piwz in eq1 to be a function of S(t).  However, when I use dsolve, numeric to solve this, and to plot using odeplot in the usual manner,...

I'm running a for loop to find a numerical solution to a linear system of equations.

x1:=1

x2:=2

x3:=3

for i from 0 to 10 by 1 do

y1:= f(x2,x3);     <-------------- these are functions of variables solved using the initial approximations above.

y2:= f(x1,x3);

y3:= f(x1,x2);

x1:=y1;    <-------------- Reassignment statements

x2:=y2;

x3:=y3;

end do;

Hello,

I want to solve the differential equation and put the solution in a list to be able to animate the pendulum.

tipe6 := proc (longueur, thetaInitial, rayonBoule, nombrePoints)

local eq, sol, valeurstheta, x, y, plotseq;

eq := ((1/2)*longueur^2+(1/5)*rayonBoule^2)*(diff(theta(t), t))^2+g*l*(cos(theta(t))-cos(thetaInitial)) = 0;

sol := dsolve({theta(0) = thetaInitial, (D(theta))(0) = 0, eq}, theta(t), numeric);

hi i want to know how to use maple to solve rational differece equations by using differential transform method DTM for example:=

{y(x+1)=(x+2)/(x-1), y(0)=1}

I'm learning maplesim 4.5 for my project. I need to create a custom component for throttle area in engine modeling?

when I created I faced an error  like  'invalid input: Modelica expects value for keyword parameter parameters to be of type list (name =realcons)'

please suggest me to create the custom component. . .

Hello everyone,

Groebner[NormalForm] fails to produce quotients for the members of Ideal when MonomialOrder is constructed with Ore_algebra.

e.g. Groebner[NormalForm](F[1], G, T, 'Q');
results in "Error, (in Groebner:-NormalForm) numeric exception: division by zero"
if F[1] in <G> and T is MonomialOrder

But it works if we dont ask for quotients or use ShortMonomialOrder

Any ideas if it is intended behaviour or a bug?

Steps to reproduce:

Is there a maple function that implements the semantics of the μ-recursive function (Wikipedia)?