Answer
$25.4^\circ$
Work Step by Step
From given triangle-
$\sin\theta$ = $\frac{30}{70}$ = $\frac{3}{7}$
Therefore-
$\theta$ = $\sin^{-1} \frac{3}{7}$
Using calculator in degree mode-
$\sin^{-1}$ → $3\div7$ = 25.3769335252
i.e. $\theta$ = $\sin^{-1}(\frac{3}{7}) \approx 25.4^\circ$
(Rounded to one decimal place)
