Answer
(b). 1.2062
Work Step by Step
$\csc (- 304)^{\circ}$
Using calculator in degree mode-
(- 304) → $\sin$ → $\frac{1}{x}$ (Recall $\csc\theta$ = $\frac{1}{\sin\theta}$)
$\csc (- 304)^{\circ}$ = 1.2062179485
Rounding it to four places past the decimal point-
$\csc (- 304)^{\circ}$ = 1.2062