Question

How do you evaluate `sin(0)`?

Answer 1

Use the unit circle to evaluate it to be 0.

Explanation:

(This one's from Wikipedia, but any version of it will be more or less the same.)

On the unit circle, the x-coordinate at each position is the cosine of the given angle, and the y-coordinate is the sine.

For `theta = 0`, the rightmost point, the coordinate pair is (1, 0). The y-coordinate is 0, so `sin(0) = 0`.

If you're not at the point where you need to use the unit circle yet, it will probably be more useful to just memorize that `sin(0) = 0` or to use a calculator.