Signals and Systems - Engineering

Q1:

If f(t) = - f(- t) satisfies Drichlet conditions, then f(t) can be expanded in Fourier series containing

A only sine terms

B only cosine terms

C cosine terms and constant

D sine terms and constant

ANS:A - only sine terms

Since f( - t) = - f(t) only sine terms will be present because sin (- x) = - sin x.