Answer:
The measure of the reference angle is 45 degrees and sin(theta) =
/2
Explanation:
The angle 3
/4 found on the unit circle is at the point (-
/2 ,
/2)
since the point is (cos, sin) sin(theta) =
/2
this angle is also equal to 135 degress
since it is in quadrant 2, 180-135 = 45 meaning the reference angle is 45
Unit circle: