The general form of a tangent function is $y=A \tan(Bx-C)$, where A is the amplitude, B affects the period, and C is the phase shift.
In the given function $y=\frac{1}{2} \tan \left(\frac{x}{2}-\pi\right)$, we have A = $\frac{1}{2}$, B = $\frac{1}{2}$, and C =
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