Answer
$\theta$ = $78.9^{\circ}$
Work Step by Step
Given, $\sin\theta$ = $0.9813$
Therefore-
$\theta$ = $\sin^{-1} 0.9813$
Using calculator in degree mode-(0.9813 → $\sin^{-1}$)
$\theta$ = $(78.902183455) ^{\circ}$
On rounding to the nearest tenth of a degree-
$\theta$ = $78.9^{\circ}$
