So a couple of functions are defined:
f(x,n,a_0,a,b)=a_0 + sum_k=1^n a(k)cos(kx)+b(k)sin(kx)
a_1(k)= some function of k
b_1(k)= some function of k
The plot should be called as:
f(pi(2x+1),10,1/3,a_1,b_1)
But this yields an error when attempting to plot:
“a_1 is a function. Try using parentheses”