Since $\arccos(1)$ is equal to $0$, the tangent of 0 is also equal to 0. Therefore, $\tan(\arccos(1)) = \tan(0) = 0$.
Since $\arccos(1)$ is equal to $0$, the tangent of 0 is also equal to 0. Therefore, $\tan(\arccos(1)) = \tan(0) = 0$.