1. The problem statement, all variables and given/known data Let f(x)=x, 0≤x≤p (a.) Compute the half-range sine series (b.) Use the series to show that 1-(1/3)+(1/5)+...=π/4 2. Relevant equations bn=(2/L)*int(from 0 to L) f(x)*sin(nπx/L) dx 3. The attempt at a solution bn=(2/p)*int(from 0 to p) x*sin(nπx/p) dx Using integration by parts I get: bn= 2[(-p*cos(nπ)/nπ) + (p*sin(nπ)/n2π2)] I'm not really sure where to go from here, any help is appreciated.