Periodic Function. 6. (a) Triangular wave function \[ f(t)=\left\{\begin{array}{ll} t, & 0 \leq t \leq a \\ 2 a-l, & a \leq t \leq 2 a \end{array} \text { and } f(2 a+t)=f(t)\right. \]

Question

6. (a) Triangular wave function \[ f(t)=\left\{\begin{array}{ll} t, & 0 \leq t \leq a \\ 2 a-l, & a \leq t \leq 2 a \end{array} \text { and } f(2 a+t)=f(t)\right. \]=f(t)