Answer
$\tan 253.8^{\circ}$ = 3.4420
Work Step by Step
Using calculator in degree mode-
253.8 → $\tan$
$\tan 253.8^{\circ}$ = 3.4420225767
Rounding it to four places past the decimal point-
$\tan 253.8^{\circ}$ = 3.4420
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