Question

I have 2 functions:

f (aa) = 9 sinaa/aa + cosaa  for 0 <= aa <= 6pi.      --- >equation 1.

and f(aa) = cosku

I need to plot the allowed values of aa which will satisfy the equation 1.
How do i do this i matlab?

Answer 1

I guess this is homework, and your question is not really clear about k u but here is a short answer.

You can plot f(a) and cos(k u) on the same plot, and then graphically find the solutions of the equation.

Here is a very basic example of code:

a=0:0.01:6*pi;
f = 9*sin(a)./a+cos(a);
plot(a,f)
hold on
u = 0:0.01:6*pi;
f2 = cos(u);
plot(u,f2)