I am trying to solve the following function for 'r' and 'theta' at various values of 'a' and 'zeta' in order to detemine the saddle points (r,theta). I have tried the following and it works fine! However, the process takes quite a long time. I was wondering if there is another method...say Newtons Method or otherwise to go about solving the two simultaneous equations (eq1,eq2) for (r,theta)?

Thanks

Robert

a:=1: zeta:=1:

This refers to standard (no problem with classic) and was asked before. However, it does not work for me.

With a German Windows XP and Maple 12 plot(sin(x), x=0..2*Pi) shows 0,5 on the y-axis, where I want 0.5. I tried tools>options>language settings and kernelopts(locale). This shows "English_United States.1252" -- but the comma persists. I changed the Windows language setting to EN -- this gives me the wrong keyboard, but still 0,5 as ticklabel. Please help!

Peter

please help me here:

we have a function:

f(x):=arctan(tan(x)*tan(x))

now let us look at the even derivative of this function at x = Pi/2. that is:

f^2(Pi/2) = -2

f^4(Pi/2) = -16

f^16(Pi/2) = -32

f^8(Pi/2) = 18944

f^10(Pi/2)= 1904128

is there a pattern in these numbers?

thanks

please help me here:

how can i integrate, say for example f(x) = cos(x), n times. means. how to find?

int(...int(int(int(cos(x),x),x),x)..,x)

thanks