Question

use reference angles to find exact value of the expression. sin -2pi/3

Answer 1

@Ahsome

Answer 2

hey i have -sqrt3/2 for my answer. is that right?

reference angle of -120 is -240 degrees. sin-240 is -sqrt3/2 is how i solved

Answer 3

@shinalcantara

Answer 4

it's given in the unit circle.. yeah it is \[-\frac{ \sqrt{3} }{ 2 }\]

Answer 5

it's not -240.. recheck

Answer 6

yeah but my teacher requires us to show work.

Answer 7

reference angles never go to the y axis