Question

Find the degree measures of the angles whose sine is -1/2.

A. 210° + n • 360° and 330° + n • 360°

B. 150° + n • 360° and 210° + n • 360°

C. 30° + n • 360° and 330° + n • 360°

D. 30° + n • 360° and 150° + n • 360°

Answer 1

A

Answer 2

how so?

Answer 3

What is the sine of 30°?

Answer 4

.5?

Answer 5

If you go back on the trigonometric circle, -sin(30°)=sin(360-30) because the sine is negative that direction.

Answer 6

Yeah you're correct thank you!

Answer 7

You are welcome.