$8-3.$ The waveform shown in the figure is sinusoidal in the interval from $\backslash ($ t$=0\backslash )$ to $\backslash ($ t$=1\backslash ),$ and is an isosceles triangle in the interval from $\backslash ($ t$=2\backslash )$ to $\backslash ($ t$=3\backslash ).$ For all other $\backslash ($ t$,$ v $\backslash )$ is zero. Write an equation for $(\backslash ($ v t $\backslash ))$ using step, ramp, and the sine functions.

P$8-3.$