Question

At a local park there is a large compass painted on the sidewalk. Blaine starts at due north and walks 150° in a clockwise direction. Using the unit circle, find the sine value of his current position.

A) negative square root of 3 over 2.
B) square root 2 over 2.
C) one half.
D) negative one half.

Answer 1

Yo sup??

the angle is in 3rd quadrant.

we can say that

sin(90+150)

=sin(180+60)

=-sin(60)

=-3^(1/2)/2

Hence the correct answer is option A

Hope this helps