backward ♦ 21—21 of 21 matching pages ♦ SearchAdvancedHelp (0.001 seconds) 21—21 of 21 matching pages 21: 29.6 Fourier Series … βΊThis solution can be constructed from (29.6.4) by backward recursion, starting with A 2 β’ n + 2 = 0 and an arbitrary nonzero value of A 2 β’ n , followed by normalization via (29.6.5) and (29.6.6). …