A function x(t) is said to have half-wave odd symmetry if :
1
\(x(t) = - x\left( {t \pm \frac{T}{2}} \right)\)
2
\(x(t) = x\left( {t - \frac{T}{4}} \right)\)
3
\(x(t) = x\left( {t + \frac{T}{4}} \right)\)
4
\(x(t) = x\left( {t - \frac{T}{2}} \right)\)
5
None of the above mentioned