f(x)= modulus(x) over the interval(-pi,pi)
i have split the function into -x for (-pi,0)
and x for(0,pi)
i was wondering whether this was the right path to take i have figured out a0 to be pi
also I need a little direction on teh fourier series on f(x)=cos(ax) where a is NOT an integer therefore I am uncertain on what to do is teh question sayin a can be a rational number?