Answer
$\sec 101.8^{\circ}$ = -4.8901
Work Step by Step
Using calculator in degree mode-
101.8 → $\cos$ → $\frac{1}{x}$
$\sec 101.8^{\circ}$ = -4.8900699598
Rounding it to four places past the decimal point-
$\sec 101.8^{\circ}$ = -4.8901