Answer:
I believe your answer is d
Step-by-step explanation:
The answer is 0.6616
Hope it helped :)
You didn't ask a question but its called a period
X=6
16 plus 2 is 18 and divided by 3 is 6
First thing to do is to change the radians to degrees so it's easier to determine our angle and where it lies in the coordinate plane.

. If we sweep out a 210 degree angle, we end up in the third quadrant, with a 30 degree angle. In this quadrant, x and y are both negative, but the hypotenuse, no matter where it is, will never ever be negative. So the side across from the 30 degree reference angle is -1, and the hypotenuse is 2, so the sine of this angle, opposite over hypotenuse, is -1/2