er der en adv maple bruger

Hi all,

Using maple 10 classic version, I am working with the below function of f(x):

restart;fx:=cos(x)+2*sin(x);plot(fx,x=0..2*Pi,y=-3..3);

I would like maple to show the x-axis values as radian instead of 0 to 6. How do I do this?

If I now differenciate fx and find the value of zero I get the answer of arctan(2)

fmx:=diff(fx,x);solve(fmx=0,x);

Now I would like to visualise this by plotting a line from x=arctan(2) vertically to function f(x). How do I do this??

The maths is in place, its just getting maple to do what I want it to that creates problems ;-)

Thanks in advance for any help.