0 votes 0 votes The trigonometric Fourier series of a periodic time function can have only cosine terms sine terms cosine and sine terms $d.c$. and cosine terms Others gate1998-ec + – admin asked Sep 26, 2022 • edited Dec 1, 2023 by makhdoom ghaya admin 46.4k points 96 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.