If ƒ(t) = – ƒ(– t) and ƒ(t) satisfy the

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If ƒ(t) = – ƒ(– t) and ƒ(t) satisfy the Dirichlet's conditions, then ƒ(t) can be expanded in a Fourier series containing

1. only sine terms
2. only cosine terms
3. cosine terms and a constant term
4. sine terms and a constant term

Correct Option: A

Condit ion ƒ(t) = – ƒ(– t) implies t hat it has rotational symmetry.