I suppose, you use the classic interface. Start Maple in Standard Mode, and it should work.

solve(sin(2*x-3)=0,x,AllSolutions);

This works with Maple 13, for older versions you may set _EnvAllsolutions to true.

yo

use exp() instead of e^

r:=Vector([x0*exp(-t/t0)*cos(t/t0),y0*exp(-t/t0)*sin(t/t0),z0*exp(-t/t0)]);
map(diff,r,t);

r1:=unapply(%,t):

r1(u);

you also could do this:

X := RandomVariable(Normal(0, 1));
A := Sample(100+X, 1000)

B:=map(x->x+100,A)

use add to add up a finite number of objects, use sum to deal with closed form terms of series.

If you show your code, we will check it.

This is interesting. So, for this special class of functions (Möbius transformations, which built a group under composition ? ) i just have to put the coefficients into a 2x2 Matrix and call MatrixPower.

Repeated compositions are not easy to handle, i see. Only in special cases...

Good to know that the usual suspects *always* seem to have an advice/solution. Of course, this is a simple example, just to show off the problem. So what i keep in mind is to try to describe repeated compositions as recurrencies.

Thanks for help

nt

Thanks,

btw.  Wolframalpha.com gives the solution Pi/2*sec(Pi*a/2) immediately.

jakubi ofc

Thanks Jacubi. According to some source, the solution is also equal to

Pi/(2*cos(a*Pi/2))

How can i convert the LerchPhi solution to this elementary expression ? I know there is a command

convert(expr,elementary);

But as promising as it sounds, it doesn't work here :-)

Substitutions in expressions suck in Maple. Better check if your task can be done in a different way.