The sine function has a period of $360$ degrees.
Since $\sin(270)$ is in the third quadrant, its reference angle is $270 - 180 = 90$ degrees.
In the third quadrant, the sine function is negative, so $\sin(270) = -\sin(90)$.
Since $\sin(90) = 1$, we have $\sin(270) = -1$.
The answer is: -1
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
What is the value of the sine of 270 degrees?

### Answer:
