The problem asks to compute $\sin(25.4^\circ)$ and round the result to four decimal places.

Let's calculate the sine of $25.4^\circ$.The sine of $25.4^\circ$ is approximately $0.4289$ when rounded to four decimal places.

Would you like further details or have any questions? Here are some related questions:

1. What is the sine of $30^\circ$?
2. How do you convert degrees to radians?
3. What is the difference between sine and cosine?
4. How would the sine value change if the angle was in radians?
5. What is the range of the sine function?

Tip: Always check that your calculator is set to degrees (not radians) when solving trigonometric problems with degree-based angles.