Answer
$d=0$ m
Work Step by Step
We substitute $t=0$ in the equation and then solve for $d$:
$d=4\tan 2\pi t$
$d=4\tan 2\pi (0)$
$d=4\tan 0$
Since $\tan0=0$;
$d=4\tan 0$
$d=4(0)$
$d=0$
Therefore, for $t=0$ seconds, $d=0$ m.
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