\(sina=0.34\) has already been calculated for us, but to calculate the angle, which is what I'm assuming you want to know, we must take the inverse trigonometric function of sin.
From: \(sina=0.34\), we can derive that:
\(a=sin ^{-1} 0.34\)
Using a scientific calculator to solve this, we can see that the degrees that a is equal to (rounded to the nearest degree) is:
\(a=20\)°
Wish you luck! :)