## Precalculus (6th Edition)

$\color{blue}{\sin{3.8} \approx -0.6}$
To approximate the value of $\sin{3.8}$, look for the y-value of the point where the terminal side o the angle 3.8 radians crosses the unit circle. Notice that for the given angle, the y-value of the point described above is around $-0.6$. Thus, $\color{blue}{\sin{3.8} \approx -0.6}$