sin x+sin3x/3+.+sin nx/n U= a 66T=U 052 oPPEM 2021/1212021/1/21 sin x+sin3x/3+…+sin nx/n -6 -4 -2 2 4 6 -0.75 -0.5 -0.25 0.25 0.5 0.75 -6 -4 -2 2 4 6 -0.75 -0.5 -0.25 0.25 0.5 0.75 n = 9 199 = n