Question

Please help and show work and steps

Answer 1

I and III

Explanation:

On a unit circle, the only two angles whose sine is
`-(√(3))/(2)` are
`(4\pi)/(3)` and
`(5\pi)/(3)`, otherwise known as
`-(\pi)/(3)`. Therefore, the correct answers are I and III. You can see the unit circle below, where the y coordinates of the above angles show
`-(√(3))/(2)`.